Finding the Fourth Proportional to 5,920.06, 8,160.78 and 4,870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,920.06 : 8,160.78 = 4,870.30 : x
2. Step 2: Convert to fraction form
   5,920.06/8,160.78 = 4,870.30/x
3. Step 3: Cross multiply
   5,920.06x = 8,160.78 × 4,870.30
4. Step 4: Simplify right side
   5,920.06x = 39,745,446.83
5. Step 5: Solve for x
   x = 39,745,446.83/5,920.06
6. Step 6: Final answer
   x = 6,713.69