Finding the Fourth Proportional to 152,057.72, 209,833.52 and 88,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,057.72 : 209,833.52 = 88,390.50 : x
2. Step 2: Convert to fraction form
   152,057.72/209,833.52 = 88,390.50/x
3. Step 3: Cross multiply
   152,057.72x = 209,833.52 × 88,390.50
4. Step 4: Simplify right side
   152,057.72x = 18,547,289,749.56
5. Step 5: Solve for x
   x = 18,547,289,749.56/152,057.72
6. Step 6: Final answer
   x = 121,975.32