Finding the Fourth Proportional to 16,160.31, 22,291.56 and 9,861.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,160.31 : 22,291.56 = 9,861.75 : x
2. Step 2: Convert to fraction form
   16,160.31/22,291.56 = 9,861.75/x
3. Step 3: Cross multiply
   16,160.31x = 22,291.56 × 9,861.75
4. Step 4: Simplify right side
   16,160.31x = 219,833,791.83
5. Step 5: Solve for x
   x = 219,833,791.83/16,160.31
6. Step 6: Final answer
   x = 13,603.32