Finding the Fourth Proportional to 6,280.45, 8,645.27 and 5,429.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,280.45 : 8,645.27 = 5,429.31 : x
2. Step 2: Convert to fraction form
   6,280.45/8,645.27 = 5,429.31/x
3. Step 3: Cross multiply
   6,280.45x = 8,645.27 × 5,429.31
4. Step 4: Simplify right side
   6,280.45x = 46,937,850.86
5. Step 5: Solve for x
   x = 46,937,850.86/6,280.45
6. Step 6: Final answer
   x = 7,473.64