Finding the Fourth Proportional to 6,931.89, 9,564.88 and 4,280.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,931.89 : 9,564.88 = 4,280.15 : x
2. Step 2: Convert to fraction form
   6,931.89/9,564.88 = 4,280.15/x
3. Step 3: Cross multiply
   6,931.89x = 9,564.88 × 4,280.15
4. Step 4: Simplify right side
   6,931.89x = 40,939,121.13
5. Step 5: Solve for x
   x = 40,939,121.13/6,931.89
6. Step 6: Final answer
   x = 5,905.91