Finding the Fourth Proportional to 11,899.12, 17,847.20 and 3,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,899.12 : 17,847.20 = 3,134.72 : x
2. Step 2: Convert to fraction form
   11,899.12/17,847.20 = 3,134.72/x
3. Step 3: Cross multiply
   11,899.12x = 17,847.20 × 3,134.72
4. Step 4: Simplify right side
   11,899.12x = 55,945,974.78
5. Step 5: Solve for x
   x = 55,945,974.78/11,899.12
6. Step 6: Final answer
   x = 4,701.69