Finding the Fourth Proportional to 3,978.54, 5,487.84 and 2,564.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.54 : 5,487.84 = 2,564.04 : x
2. Step 2: Convert to fraction form
   3,978.54/5,487.84 = 2,564.04/x
3. Step 3: Cross multiply
   3,978.54x = 5,487.84 × 2,564.04
4. Step 4: Simplify right side
   3,978.54x = 14,071,041.27
5. Step 5: Solve for x
   x = 14,071,041.27/3,978.54
6. Step 6: Final answer
   x = 3,536.73