Finding the Fourth Proportional to 21,192.88, 31,785.72 and 5,612.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,192.88 : 31,785.72 = 5,612.08 : x
2. Step 2: Convert to fraction form
   21,192.88/31,785.72 = 5,612.08/x
3. Step 3: Cross multiply
   21,192.88x = 31,785.72 × 5,612.08
4. Step 4: Simplify right side
   21,192.88x = 178,384,003.50
5. Step 5: Solve for x
   x = 178,384,003.50/21,192.88
6. Step 6: Final answer
   x = 8,417.17