Finding the Fourth Proportional to 8,820.48, 12,170.24 and 5,509.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820.48 : 12,170.24 = 5,509.12 : x
2. Step 2: Convert to fraction form
   8,820.48/12,170.24 = 5,509.12/x
3. Step 3: Cross multiply
   8,820.48x = 12,170.24 × 5,509.12
4. Step 4: Simplify right side
   8,820.48x = 67,047,312.59
5. Step 5: Solve for x
   x = 67,047,312.59/8,820.48
6. Step 6: Final answer
   x = 7,601.32