Finding the Fourth Proportional to 5,401.30, 7,487.80 and 5,105.66

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.30 : 7,487.80 = 5,105.66 : x
2. Step 2: Convert to fraction form
   5,401.30/7,487.80 = 5,105.66/x
3. Step 3: Cross multiply
   5,401.30x = 7,487.80 × 5,105.66
4. Step 4: Simplify right side
   5,401.30x = 38,230,160.95
5. Step 5: Solve for x
   x = 38,230,160.95/5,401.30
6. Step 6: Final answer
   x = 7,077.96