Finding the Fourth Proportional to 12,915.54, 19,373.40 and 5,124.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.54 : 19,373.40 = 5,124.33 : x
2. Step 2: Convert to fraction form
   12,915.54/19,373.40 = 5,124.33/x
3. Step 3: Cross multiply
   12,915.54x = 19,373.40 × 5,124.33
4. Step 4: Simplify right side
   12,915.54x = 99,275,694.82
5. Step 5: Solve for x
   x = 99,275,694.82/12,915.54
6. Step 6: Final answer
   x = 7,686.53