Finding the Fourth Proportional to 14,013.15, 19,337.56 and 7,639.61

Step by Step Solution

1. Step 1: Write the proportion equation
   14,013.15 : 19,337.56 = 7,639.61 : x
2. Step 2: Convert to fraction form
   14,013.15/19,337.56 = 7,639.61/x
3. Step 3: Cross multiply
   14,013.15x = 19,337.56 × 7,639.61
4. Step 4: Simplify right side
   14,013.15x = 147,731,300.96
5. Step 5: Solve for x
   x = 147,731,300.96/14,013.15
6. Step 6: Final answer
   x = 10,542.33