Finding the Fourth Proportional to 8,742.89, 12,061.34 and 5,909.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,742.89 : 12,061.34 = 5,909.22 : x
2. Step 2: Convert to fraction form
   8,742.89/12,061.34 = 5,909.22/x
3. Step 3: Cross multiply
   8,742.89x = 12,061.34 × 5,909.22
4. Step 4: Simplify right side
   8,742.89x = 71,273,082.01
5. Step 5: Solve for x
   x = 71,273,082.01/8,742.89
6. Step 6: Final answer
   x = 8,152.12