Finding the Fourth Proportional to 31,647.75, 47,443.69 and 11,940.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,647.75 : 47,443.69 = 11,940.15 : x
2. Step 2: Convert to fraction form
   31,647.75/47,443.69 = 11,940.15/x
3. Step 3: Cross multiply
   31,647.75x = 47,443.69 × 11,940.15
4. Step 4: Simplify right side
   31,647.75x = 566,484,775.15
5. Step 5: Solve for x
   x = 566,484,775.15/31,647.75
6. Step 6: Final answer
   x = 17,899.69