Finding the Fourth Proportional to 14,870.05, 20,520.61 and 8,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,870.05 : 20,520.61 = 8,155.50 : x
2. Step 2: Convert to fraction form
   14,870.05/20,520.61 = 8,155.50/x
3. Step 3: Cross multiply
   14,870.05x = 20,520.61 × 8,155.50
4. Step 4: Simplify right side
   14,870.05x = 167,355,834.86
5. Step 5: Solve for x
   x = 167,355,834.86/14,870.05
6. Step 6: Final answer
   x = 11,254.56