Finding the Fourth Proportional to 12,853.31, 17,737.04 and 7,187.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,853.31 : 17,737.04 = 7,187.96 : x
2. Step 2: Convert to fraction form
   12,853.31/17,737.04 = 7,187.96/x
3. Step 3: Cross multiply
   12,853.31x = 17,737.04 × 7,187.96
4. Step 4: Simplify right side
   12,853.31x = 127,493,196.35
5. Step 5: Solve for x
   x = 127,493,196.35/12,853.31
6. Step 6: Final answer
   x = 9,919.10