Finding the Third Proportional to 138,231,404 and 296,976,686

Step by Step Solution

1. Step 1: Write the proportion equation
   138,231,404 : 296,976,686 = 296,976,686 : x
2. Step 2: Convert to fraction form
   138,231,404/296,976,686 = 296,976,686/x
3. Step 3: Cross multiply
   138,231,404x = 296,976,686 × 296,976,686
4. Step 4: Simplify right side
   138,231,404x = 88,195,152,027,542,592
5. Step 5: Solve for x
   x = 88,195,152,027,542,592/138,231,404
6. Step 6: Final answer
   x = 638,025,437.60