Finding the Fourth Proportional to 11,906.91, 17,862.18 and 3,142.51

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.91 : 17,862.18 = 3,142.51 : x
2. Step 2: Convert to fraction form
   11,906.91/17,862.18 = 3,142.51/x
3. Step 3: Cross multiply
   11,906.91x = 17,862.18 × 3,142.51
4. Step 4: Simplify right side
   11,906.91x = 56,132,079.27
5. Step 5: Solve for x
   x = 56,132,079.27/11,906.91
6. Step 6: Final answer
   x = 4,714.24