Finding the Fourth Proportional to 7,643.16, 10,542.71 and 5,521.81

Step by Step Solution

1. Step 1: Write the proportion equation
   7,643.16 : 10,542.71 = 5,521.81 : x
2. Step 2: Convert to fraction form
   7,643.16/10,542.71 = 5,521.81/x
3. Step 3: Cross multiply
   7,643.16x = 10,542.71 × 5,521.81
4. Step 4: Simplify right side
   7,643.16x = 58,214,847.31
5. Step 5: Solve for x
   x = 58,214,847.31/7,643.16
6. Step 6: Final answer
   x = 7,616.59