Finding the Fourth Proportional to 8,781.30, 12,118.22 and 5,423.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.30 : 12,118.22 = 5,423.34 : x
2. Step 2: Convert to fraction form
   8,781.30/12,118.22 = 5,423.34/x
3. Step 3: Cross multiply
   8,781.30x = 12,118.22 × 5,423.34
4. Step 4: Simplify right side
   8,781.30x = 65,721,200.14
5. Step 5: Solve for x
   x = 65,721,200.14/8,781.30
6. Step 6: Final answer
   x = 7,484.22