Finding the Fourth Proportional to 5,978.90, 8,254.58 and 3,855.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.90 : 8,254.58 = 3,855.18 : x
2. Step 2: Convert to fraction form
   5,978.90/8,254.58 = 3,855.18/x
3. Step 3: Cross multiply
   5,978.90x = 8,254.58 × 3,855.18
4. Step 4: Simplify right side
   5,978.90x = 31,822,903.40
5. Step 5: Solve for x
   x = 31,822,903.40/5,978.90
6. Step 6: Final answer
   x = 5,322.53