Finding the Fourth Proportional to 4,978.46, 6,870.11 and 2,987.84

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.46 : 6,870.11 = 2,987.84 : x
2. Step 2: Convert to fraction form
   4,978.46/6,870.11 = 2,987.84/x
3. Step 3: Cross multiply
   4,978.46x = 6,870.11 × 2,987.84
4. Step 4: Simplify right side
   4,978.46x = 20,526,789.46
5. Step 5: Solve for x
   x = 20,526,789.46/4,978.46
6. Step 6: Final answer
   x = 4,123.12