Finding the Fourth Proportional to 11,861.91, 16,358.83 and 9,842.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,861.91 : 16,358.83 = 9,842.12 : x
2. Step 2: Convert to fraction form
   11,861.91/16,358.83 = 9,842.12/x
3. Step 3: Cross multiply
   11,861.91x = 16,358.83 × 9,842.12
4. Step 4: Simplify right side
   11,861.91x = 161,005,608.82
5. Step 5: Solve for x
   x = 161,005,608.82/11,861.91
6. Step 6: Final answer
   x = 13,573.33