Finding the Third Proportional to 158,128.50 and 247,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,128.50 : 247,561.50 = 247,561.50 : x
2. Step 2: Convert to fraction form
   158,128.50/247,561.50 = 247,561.50/x
3. Step 3: Cross multiply
   158,128.50x = 247,561.50 × 247,561.50
4. Step 4: Simplify right side
   158,128.50x = 61,286,696,282.25
5. Step 5: Solve for x
   x = 61,286,696,282.25/158,128.50
6. Step 6: Final answer
   x = 387,575.27