Finding the Third Proportional to 516,690 and 754,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   516,690 : 754,618.50 = 754,618.50 : x
2. Step 2: Convert to fraction form
   516,690/754,618.50 = 754,618.50/x
3. Step 3: Cross multiply
   516,690x = 754,618.50 × 754,618.50
4. Step 4: Simplify right side
   516,690x = 569,449,080,542.25
5. Step 5: Solve for x
   x = 569,449,080,542.25/516,690
6. Step 6: Final answer
   x = 1,102,109.74