Finding the Fourth Proportional to 21,310.74, 31,959.63 and 7,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,310.74 : 31,959.63 = 7,456.50 : x
2. Step 2: Convert to fraction form
   21,310.74/31,959.63 = 7,456.50/x
3. Step 3: Cross multiply
   21,310.74x = 31,959.63 × 7,456.50
4. Step 4: Simplify right side
   21,310.74x = 238,306,981.10
5. Step 5: Solve for x
   x = 238,306,981.10/21,310.74
6. Step 6: Final answer
   x = 11,182.48