Finding the Third Proportional to 5,121,194 and 7,929,120

Step by Step Solution

1. Step 1: Write the proportion equation
   5,121,194 : 7,929,120 = 7,929,120 : x
2. Step 2: Convert to fraction form
   5,121,194/7,929,120 = 7,929,120/x
3. Step 3: Cross multiply
   5,121,194x = 7,929,120 × 7,929,120
4. Step 4: Simplify right side
   5,121,194x = 62,870,943,974,400
5. Step 5: Solve for x
   x = 62,870,943,974,400/5,121,194
6. Step 6: Final answer
   x = 12,276,618.30