Finding the Fourth Proportional to 21,061.54, 31,572.78 and 7,922.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.54 : 31,572.78 = 7,922.62 : x
2. Step 2: Convert to fraction form
   21,061.54/31,572.78 = 7,922.62/x
3. Step 3: Cross multiply
   21,061.54x = 31,572.78 × 7,922.62
4. Step 4: Simplify right side
   21,061.54x = 250,139,138.28
5. Step 5: Solve for x
   x = 250,139,138.28/21,061.54
6. Step 6: Final answer
   x = 11,876.58