Finding the Fourth Proportional to 151,809.50, 209,515.59 and 88,147.30

Step by Step Solution

1. Step 1: Write the proportion equation
   151,809.50 : 209,515.59 = 88,147.30 : x
2. Step 2: Convert to fraction form
   151,809.50/209,515.59 = 88,147.30/x
3. Step 3: Cross multiply
   151,809.50x = 209,515.59 × 88,147.30
4. Step 4: Simplify right side
   151,809.50x = 18,468,233,482.18
5. Step 5: Solve for x
   x = 18,468,233,482.18/151,809.50
6. Step 6: Final answer
   x = 121,654.00