Finding the Fourth Proportional to 6,521.90, 8,998.83 and 3,870.17

Step by Step Solution

1. Step 1: Write the proportion equation
   6,521.90 : 8,998.83 = 3,870.17 : x
2. Step 2: Convert to fraction form
   6,521.90/8,998.83 = 3,870.17/x
3. Step 3: Cross multiply
   6,521.90x = 8,998.83 × 3,870.17
4. Step 4: Simplify right side
   6,521.90x = 34,826,956.91
5. Step 5: Solve for x
   x = 34,826,956.91/6,521.90
6. Step 6: Final answer
   x = 5,340.01