Finding the Fourth Proportional to 4,978.71, 6,870.23 and 2,854.22

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.71 : 6,870.23 = 2,854.22 : x
2. Step 2: Convert to fraction form
   4,978.71/6,870.23 = 2,854.22/x
3. Step 3: Cross multiply
   4,978.71x = 6,870.23 × 2,854.22
4. Step 4: Simplify right side
   4,978.71x = 19,609,099.25
5. Step 5: Solve for x
   x = 19,609,099.25/4,978.71
6. Step 6: Final answer
   x = 3,938.59