Finding the Third Proportional to 121,599,117,990 and 253,262,921,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,599,117,990 : 253,262,921,074.50 = 253,262,921,074.50 : x
2. Step 2: Convert to fraction form
   121,599,117,990/253,262,921,074.50 = 253,262,921,074.50/x
3. Step 3: Cross multiply
   121,599,117,990x = 253,262,921,074.50 × 253,262,921,074.50
4. Step 4: Simplify right side
   121,599,117,990x = 64,142,107,191,188,415,053,824
5. Step 5: Solve for x
   x = 64,142,107,191,188,415,053,824/121,599,117,990
6. Step 6: Final answer
   x = 527,488,260,206.49