Finding the Third Proportional to 254,366 and 393,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   254,366 : 393,516.50 = 393,516.50 : x
2. Step 2: Convert to fraction form
   254,366/393,516.50 = 393,516.50/x
3. Step 3: Cross multiply
   254,366x = 393,516.50 × 393,516.50
4. Step 4: Simplify right side
   254,366x = 154,855,235,772.25
5. Step 5: Solve for x
   x = 154,855,235,772.25/254,366
6. Step 6: Final answer
   x = 608,789.05