Finding the Third Proportional to 156,840 and 249,277.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,840 : 249,277.50 = 249,277.50 : x
2. Step 2: Convert to fraction form
   156,840/249,277.50 = 249,277.50/x
3. Step 3: Cross multiply
   156,840x = 249,277.50 × 249,277.50
4. Step 4: Simplify right side
   156,840x = 62,139,272,006.25
5. Step 5: Solve for x
   x = 62,139,272,006.25/156,840
6. Step 6: Final answer
   x = 396,195.31