Finding the Fourth Proportional to 11,231.46, 16,830.72 and 4,989.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,231.46 : 16,830.72 = 4,989.60 : x
2. Step 2: Convert to fraction form
   11,231.46/16,830.72 = 4,989.60/x
3. Step 3: Cross multiply
   11,231.46x = 16,830.72 × 4,989.60
4. Step 4: Simplify right side
   11,231.46x = 83,978,560.51
5. Step 5: Solve for x
   x = 83,978,560.51/11,231.46
6. Step 6: Final answer
   x = 7,477.08