Finding the Fourth Proportional to 10,561.55, 15,841.98 and 5,018.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,561.55 : 15,841.98 = 5,018.90 : x
2. Step 2: Convert to fraction form
   10,561.55/15,841.98 = 5,018.90/x
3. Step 3: Cross multiply
   10,561.55x = 15,841.98 × 5,018.90
4. Step 4: Simplify right side
   10,561.55x = 79,509,234.21
5. Step 5: Solve for x
   x = 79,509,234.21/10,561.55
6. Step 6: Final answer
   x = 7,528.18