Finding the Fourth Proportional to 12,505.77, 18,762.18 and 5,115.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,505.77 : 18,762.18 = 5,115.53 : x
2. Step 2: Convert to fraction form
   12,505.77/18,762.18 = 5,115.53/x
3. Step 3: Cross multiply
   12,505.77x = 18,762.18 × 5,115.53
4. Step 4: Simplify right side
   12,505.77x = 95,978,498.38
5. Step 5: Solve for x
   x = 95,978,498.38/12,505.77
6. Step 6: Final answer
   x = 7,674.74