Finding the Fourth Proportional to 152,635.50, 210,636.99 and 85,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,635.50 : 210,636.99 = 85,567.50 : x
2. Step 2: Convert to fraction form
   152,635.50/210,636.99 = 85,567.50/x
3. Step 3: Cross multiply
   152,635.50x = 210,636.99 × 85,567.50
4. Step 4: Simplify right side
   152,635.50x = 18,023,680,641.83
5. Step 5: Solve for x
   x = 18,023,680,641.83/152,635.50
6. Step 6: Final answer
   x = 118,083.15