Finding the Fourth Proportional to 12,344.31, 17,036.55 and 7,039.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,344.31 : 17,036.55 = 7,039.89 : x
2. Step 2: Convert to fraction form
   12,344.31/17,036.55 = 7,039.89/x
3. Step 3: Cross multiply
   12,344.31x = 17,036.55 × 7,039.89
4. Step 4: Simplify right side
   12,344.31x = 119,935,437.98
5. Step 5: Solve for x
   x = 119,935,437.98/12,344.31
6. Step 6: Final answer
   x = 9,715.85