Finding the Fourth Proportional to 5,391.86, 7,439.72 and 3,503.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,391.86 : 7,439.72 = 3,503.30 : x
2. Step 2: Convert to fraction form
   5,391.86/7,439.72 = 3,503.30/x
3. Step 3: Cross multiply
   5,391.86x = 7,439.72 × 3,503.30
4. Step 4: Simplify right side
   5,391.86x = 26,063,516.36
5. Step 5: Solve for x
   x = 26,063,516.36/5,391.86
6. Step 6: Final answer
   x = 4,833.87