Finding the Fourth Proportional to 9,051.92, 12,489.72 and 5,508.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.92 : 12,489.72 = 5,508.80 : x
2. Step 2: Convert to fraction form
   9,051.92/12,489.72 = 5,508.80/x
3. Step 3: Cross multiply
   9,051.92x = 12,489.72 × 5,508.80
4. Step 4: Simplify right side
   9,051.92x = 68,803,369.54
5. Step 5: Solve for x
   x = 68,803,369.54/9,051.92
6. Step 6: Final answer
   x = 7,600.97