Finding the Fourth Proportional to 21,111.88, 31,669.64 and 5,529.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.88 : 31,669.64 = 5,529.50 : x
2. Step 2: Convert to fraction form
   21,111.88/31,669.64 = 5,529.50/x
3. Step 3: Cross multiply
   21,111.88x = 31,669.64 × 5,529.50
4. Step 4: Simplify right side
   21,111.88x = 175,117,274.38
5. Step 5: Solve for x
   x = 175,117,274.38/21,111.88
6. Step 6: Final answer
   x = 8,294.73