Finding the Third Proportional to 356,715 and 742,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,715 : 742,891.50 = 742,891.50 : x
2. Step 2: Convert to fraction form
   356,715/742,891.50 = 742,891.50/x
3. Step 3: Cross multiply
   356,715x = 742,891.50 × 742,891.50
4. Step 4: Simplify right side
   356,715x = 551,887,780,772.25
5. Step 5: Solve for x
   x = 551,887,780,772.25/356,715
6. Step 6: Final answer
   x = 1,547,139.26