Finding the Third Proportional to 121,843 and 253,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,843 : 253,436.50 = 253,436.50 : x
2. Step 2: Convert to fraction form
   121,843/253,436.50 = 253,436.50/x
3. Step 3: Cross multiply
   121,843x = 253,436.50 × 253,436.50
4. Step 4: Simplify right side
   121,843x = 64,230,059,532.25
5. Step 5: Solve for x
   x = 64,230,059,532.25/121,843
6. Step 6: Final answer
   x = 527,154.28