Finding the Fourth Proportional to 4,978.50, 6,870.34 and 2,883.84

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.50 : 6,870.34 = 2,883.84 : x
2. Step 2: Convert to fraction form
   4,978.50/6,870.34 = 2,883.84/x
3. Step 3: Cross multiply
   4,978.50x = 6,870.34 × 2,883.84
4. Step 4: Simplify right side
   4,978.50x = 19,812,961.31
5. Step 5: Solve for x
   x = 19,812,961.31/4,978.50
6. Step 6: Final answer
   x = 3,979.70