Finding the Fourth Proportional to 21,154.88, 31,710.72 and 7,292

Step by Step Solution

1. Step 1: Write the proportion equation
   21,154.88 : 31,710.72 = 7,292 : x
2. Step 2: Convert to fraction form
   21,154.88/31,710.72 = 7,292/x
3. Step 3: Cross multiply
   21,154.88x = 31,710.72 × 7,292
4. Step 4: Simplify right side
   21,154.88x = 231,234,570.24
5. Step 5: Solve for x
   x = 231,234,570.24/21,154.88
6. Step 6: Final answer
   x = 10,930.55