Finding the Fourth Proportional to 9,148.38, 12,624.71 and 5,115.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,148.38 : 12,624.71 = 5,115.21 : x
2. Step 2: Convert to fraction form
   9,148.38/12,624.71 = 5,115.21/x
3. Step 3: Cross multiply
   9,148.38x = 12,624.71 × 5,115.21
4. Step 4: Simplify right side
   9,148.38x = 64,578,055.78
5. Step 5: Solve for x
   x = 64,578,055.78/9,148.38
6. Step 6: Final answer
   x = 7,058.96