Finding the Fourth Proportional to 206,499.54, 309,781.71 and 88,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   206,499.54 : 309,781.71 = 88,171.50 : x
2. Step 2: Convert to fraction form
   206,499.54/309,781.71 = 88,171.50/x
3. Step 3: Cross multiply
   206,499.54x = 309,781.71 × 88,171.50
4. Step 4: Simplify right side
   206,499.54x = 27,313,918,043.27
5. Step 5: Solve for x
   x = 27,313,918,043.27/206,499.54
6. Step 6: Final answer
   x = 132,271.08