Finding the Fourth Proportional to 10,963.89, 16,454.34 and 4,390.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,963.89 : 16,454.34 = 4,390.74 : x
2. Step 2: Convert to fraction form
   10,963.89/16,454.34 = 4,390.74/x
3. Step 3: Cross multiply
   10,963.89x = 16,454.34 × 4,390.74
4. Step 4: Simplify right side
   10,963.89x = 72,246,728.81
5. Step 5: Solve for x
   x = 72,246,728.81/10,963.89
6. Step 6: Final answer
   x = 6,589.52