Finding the Fourth Proportional to 10,495.74, 15,737.61 and 4,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,495.74 : 15,737.61 = 4,258.78 : x
2. Step 2: Convert to fraction form
   10,495.74/15,737.61 = 4,258.78/x
3. Step 3: Cross multiply
   10,495.74x = 15,737.61 × 4,258.78
4. Step 4: Simplify right side
   10,495.74x = 67,023,018.72
5. Step 5: Solve for x
   x = 67,023,018.72/10,495.74
6. Step 6: Final answer
   x = 6,385.74