Finding the Fourth Proportional to 13,830.72, 19,087.52 and 7,864.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,830.72 : 19,087.52 = 7,864.24 : x
2. Step 2: Convert to fraction form
   13,830.72/19,087.52 = 7,864.24/x
3. Step 3: Cross multiply
   13,830.72x = 19,087.52 × 7,864.24
4. Step 4: Simplify right side
   13,830.72x = 150,108,838.28
5. Step 5: Solve for x
   x = 150,108,838.28/13,830.72
6. Step 6: Final answer
   x = 10,853.29