Finding the Fourth Proportional to 10,561.99, 15,840.49 and 3,542.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,561.99 : 15,840.49 = 3,542.26 : x
2. Step 2: Convert to fraction form
   10,561.99/15,840.49 = 3,542.26/x
3. Step 3: Cross multiply
   10,561.99x = 15,840.49 × 3,542.26
4. Step 4: Simplify right side
   10,561.99x = 56,111,134.11
5. Step 5: Solve for x
   x = 56,111,134.11/10,561.99
6. Step 6: Final answer
   x = 5,312.55