Finding the Fourth Proportional to 6,891.84, 9,510.86 and 3,907.62

Step by Step Solution

1. Step 1: Write the proportion equation
   6,891.84 : 9,510.86 = 3,907.62 : x
2. Step 2: Convert to fraction form
   6,891.84/9,510.86 = 3,907.62/x
3. Step 3: Cross multiply
   6,891.84x = 9,510.86 × 3,907.62
4. Step 4: Simplify right side
   6,891.84x = 37,164,826.75
5. Step 5: Solve for x
   x = 37,164,826.75/6,891.84
6. Step 6: Final answer
   x = 5,392.58