Finding the Fourth Proportional to 12,915.72, 19,383.21 and 5,019.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.72 : 19,383.21 = 5,019.48 : x
2. Step 2: Convert to fraction form
   12,915.72/19,383.21 = 5,019.48/x
3. Step 3: Cross multiply
   12,915.72x = 19,383.21 × 5,019.48
4. Step 4: Simplify right side
   12,915.72x = 97,293,634.93
5. Step 5: Solve for x
   x = 97,293,634.93/12,915.72
6. Step 6: Final answer
   x = 7,532.96