Finding the Fourth Proportional to 12,853.30, 17,737.43 and 7,187.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,853.30 : 17,737.43 = 7,187.98 : x
2. Step 2: Convert to fraction form
   12,853.30/17,737.43 = 7,187.98/x
3. Step 3: Cross multiply
   12,853.30x = 17,737.43 × 7,187.98
4. Step 4: Simplify right side
   12,853.30x = 127,496,318.47
5. Step 5: Solve for x
   x = 127,496,318.47/12,853.30
6. Step 6: Final answer
   x = 9,919.35