Finding the Fourth Proportional to 32,499.76, 48,745.86 and 9,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   32,499.76 : 48,745.86 = 9,128.20 : x
2. Step 2: Convert to fraction form
   32,499.76/48,745.86 = 9,128.20/x
3. Step 3: Cross multiply
   32,499.76x = 48,745.86 × 9,128.20
4. Step 4: Simplify right side
   32,499.76x = 444,961,959.25
5. Step 5: Solve for x
   x = 444,961,959.25/32,499.76
6. Step 6: Final answer
   x = 13,691.24