Finding the Third Proportional to 423,366 and 915,742.50

Step by Step Solution

1. Step 1: Write the proportion equation
   423,366 : 915,742.50 = 915,742.50 : x
2. Step 2: Convert to fraction form
   423,366/915,742.50 = 915,742.50/x
3. Step 3: Cross multiply
   423,366x = 915,742.50 × 915,742.50
4. Step 4: Simplify right side
   423,366x = 838,584,326,306.25
5. Step 5: Solve for x
   x = 838,584,326,306.25/423,366
6. Step 6: Final answer
   x = 1,980,755.01