Finding the Fourth Proportional to 13,827.31, 19,071.49 and 9,039.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,827.31 : 19,071.49 = 9,039.83 : x
2. Step 2: Convert to fraction form
   13,827.31/19,071.49 = 9,039.83/x
3. Step 3: Cross multiply
   13,827.31x = 19,071.49 × 9,039.83
4. Step 4: Simplify right side
   13,827.31x = 172,403,024.57
5. Step 5: Solve for x
   x = 172,403,024.57/13,827.31
6. Step 6: Final answer
   x = 12,468.30