Finding the Fourth Proportional to 8,925.42, 12,311.49 and 5,742.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,925.42 : 12,311.49 = 5,742.86 : x
2. Step 2: Convert to fraction form
   8,925.42/12,311.49 = 5,742.86/x
3. Step 3: Cross multiply
   8,925.42x = 12,311.49 × 5,742.86
4. Step 4: Simplify right side
   8,925.42x = 70,703,134.75
5. Step 5: Solve for x
   x = 70,703,134.75/8,925.42
6. Step 6: Final answer
   x = 7,921.55