Finding the Fourth Proportional to 5,364.80, 8,040.72 and 3,900.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,364.80 : 8,040.72 = 3,900.32 : x
2. Step 2: Convert to fraction form
   5,364.80/8,040.72 = 3,900.32/x
3. Step 3: Cross multiply
   5,364.80x = 8,040.72 × 3,900.32
4. Step 4: Simplify right side
   5,364.80x = 31,361,381.03
5. Step 5: Solve for x
   x = 31,361,381.03/5,364.80
6. Step 6: Final answer
   x = 5,845.77