Finding the Fourth Proportional to 7,847.57, 10,830.15 and 5,490.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,847.57 : 10,830.15 = 5,490.47 : x
2. Step 2: Convert to fraction form
   7,847.57/10,830.15 = 5,490.47/x
3. Step 3: Cross multiply
   7,847.57x = 10,830.15 × 5,490.47
4. Step 4: Simplify right side
   7,847.57x = 59,462,559.52
5. Step 5: Solve for x
   x = 59,462,559.52/7,847.57
6. Step 6: Final answer
   x = 7,577.20