Finding the Fourth Proportional to 8,690.52, 13,056.57 and 5,576.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690.52 : 13,056.57 = 5,576.61 : x
2. Step 2: Convert to fraction form
   8,690.52/13,056.57 = 5,576.61/x
3. Step 3: Cross multiply
   8,690.52x = 13,056.57 × 5,576.61
4. Step 4: Simplify right side
   8,690.52x = 72,811,398.83
5. Step 5: Solve for x
   x = 72,811,398.83/8,690.52
6. Step 6: Final answer
   x = 8,378.26