Finding the Fourth Proportional to 10,561.48, 15,840.38 and 3,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,561.48 : 15,840.38 = 3,540.80 : x
2. Step 2: Convert to fraction form
   10,561.48/15,840.38 = 3,540.80/x
3. Step 3: Cross multiply
   10,561.48x = 15,840.38 × 3,540.80
4. Step 4: Simplify right side
   10,561.48x = 56,087,617.50
5. Step 5: Solve for x
   x = 56,087,617.50/10,561.48
6. Step 6: Final answer
   x = 5,310.58