Finding the Fourth Proportional to 152,641.96, 210,634.50 and 85,561

Step by Step Solution

1. Step 1: Write the proportion equation
   152,641.96 : 210,634.50 = 85,561 : x
2. Step 2: Convert to fraction form
   152,641.96/210,634.50 = 85,561/x
3. Step 3: Cross multiply
   152,641.96x = 210,634.50 × 85,561
4. Step 4: Simplify right side
   152,641.96x = 18,022,098,454.50
5. Step 5: Solve for x
   x = 18,022,098,454.50/152,641.96
6. Step 6: Final answer
   x = 118,067.79