Finding the Fourth Proportional to 6,300.84, 8,689.50 and 3,943.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,300.84 : 8,689.50 = 3,943.20 : x
2. Step 2: Convert to fraction form
   6,300.84/8,689.50 = 3,943.20/x
3. Step 3: Cross multiply
   6,300.84x = 8,689.50 × 3,943.20
4. Step 4: Simplify right side
   6,300.84x = 34,264,436.40
5. Step 5: Solve for x
   x = 34,264,436.40/6,300.84
6. Step 6: Final answer
   x = 5,438.07