Finding the Fourth Proportional to 8,801.60, 12,147.37 and 5,666.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,801.60 : 12,147.37 = 5,666.90 : x
2. Step 2: Convert to fraction form
   8,801.60/12,147.37 = 5,666.90/x
3. Step 3: Cross multiply
   8,801.60x = 12,147.37 × 5,666.90
4. Step 4: Simplify right side
   8,801.60x = 68,837,856.15
5. Step 5: Solve for x
   x = 68,837,856.15/8,801.60
6. Step 6: Final answer
   x = 7,821.07