Finding the Fourth Proportional to 5,385.76, 7,436.01 and 3,969.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.76 : 7,436.01 = 3,969.61 : x
2. Step 2: Convert to fraction form
   5,385.76/7,436.01 = 3,969.61/x
3. Step 3: Cross multiply
   5,385.76x = 7,436.01 × 3,969.61
4. Step 4: Simplify right side
   5,385.76x = 29,518,059.66
5. Step 5: Solve for x
   x = 29,518,059.66/5,385.76
6. Step 6: Final answer
   x = 5,480.76