Finding the Fourth Proportional to 13,038.29, 17,979.88 and 9,815.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,038.29 : 17,979.88 = 9,815.83 : x
2. Step 2: Convert to fraction form
   13,038.29/17,979.88 = 9,815.83/x
3. Step 3: Cross multiply
   13,038.29x = 17,979.88 × 9,815.83
4. Step 4: Simplify right side
   13,038.29x = 176,487,445.50
5. Step 5: Solve for x
   x = 176,487,445.50/13,038.29
6. Step 6: Final answer
   x = 13,536.09