Finding the Fourth Proportional to 21,043.40, 31,550.51 and 7,892.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,043.40 : 31,550.51 = 7,892.24 : x
2. Step 2: Convert to fraction form
   21,043.40/31,550.51 = 7,892.24/x
3. Step 3: Cross multiply
   21,043.40x = 31,550.51 × 7,892.24
4. Step 4: Simplify right side
   21,043.40x = 249,003,999.83
5. Step 5: Solve for x
   x = 249,003,999.83/21,043.40
6. Step 6: Final answer
   x = 11,832.88