Finding the Fourth Proportional to 21,227.79, 31,839.86 and 7,187.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.79 : 31,839.86 = 7,187.52 : x
2. Step 2: Convert to fraction form
   21,227.79/31,839.86 = 7,187.52/x
3. Step 3: Cross multiply
   21,227.79x = 31,839.86 × 7,187.52
4. Step 4: Simplify right side
   21,227.79x = 228,849,594.61
5. Step 5: Solve for x
   x = 228,849,594.61/21,227.79
6. Step 6: Final answer
   x = 10,780.66