Finding the Third Proportional to 142,276.50 and 329,386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,276.50 : 329,386.50 = 329,386.50 : x
2. Step 2: Convert to fraction form
   142,276.50/329,386.50 = 329,386.50/x
3. Step 3: Cross multiply
   142,276.50x = 329,386.50 × 329,386.50
4. Step 4: Simplify right side
   142,276.50x = 108,495,466,382.25
5. Step 5: Solve for x
   x = 108,495,466,382.25/142,276.50
6. Step 6: Final answer
   x = 762,567.72