Finding the Fourth Proportional to 22,920.57, 34,386.23 and 7,124.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,920.57 : 34,386.23 = 7,124.78 : x
2. Step 2: Convert to fraction form
   22,920.57/34,386.23 = 7,124.78/x
3. Step 3: Cross multiply
   22,920.57x = 34,386.23 × 7,124.78
4. Step 4: Simplify right side
   22,920.57x = 244,994,427.56
5. Step 5: Solve for x
   x = 244,994,427.56/22,920.57
6. Step 6: Final answer
   x = 10,688.85