Finding the Fourth Proportional to 11,861.28, 17,793.72 and 4,072.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,861.28 : 17,793.72 = 4,072.32 : x
2. Step 2: Convert to fraction form
   11,861.28/17,793.72 = 4,072.32/x
3. Step 3: Cross multiply
   11,861.28x = 17,793.72 × 4,072.32
4. Step 4: Simplify right side
   11,861.28x = 72,461,721.83
5. Step 5: Solve for x
   x = 72,461,721.83/11,861.28
6. Step 6: Final answer
   x = 6,109.10