Finding the Fourth Proportional to 25,155.76, 37,737.72 and 8,516.80

Step by Step Solution

1. Step 1: Write the proportion equation
   25,155.76 : 37,737.72 = 8,516.80 : x
2. Step 2: Convert to fraction form
   25,155.76/37,737.72 = 8,516.80/x
3. Step 3: Cross multiply
   25,155.76x = 37,737.72 × 8,516.80
4. Step 4: Simplify right side
   25,155.76x = 321,404,613.70
5. Step 5: Solve for x
   x = 321,404,613.70/25,155.76
6. Step 6: Final answer
   x = 12,776.58