Finding the Fourth Proportional to 14,870.59, 20,521.69 and 8,155.81

Step by Step Solution

1. Step 1: Write the proportion equation
   14,870.59 : 20,521.69 = 8,155.81 : x
2. Step 2: Convert to fraction form
   14,870.59/20,521.69 = 8,155.81/x
3. Step 3: Cross multiply
   14,870.59x = 20,521.69 × 8,155.81
4. Step 4: Simplify right side
   14,870.59x = 167,371,004.52
5. Step 5: Solve for x
   x = 167,371,004.52/14,870.59
6. Step 6: Final answer
   x = 11,255.17