Finding the Fourth Proportional to 2,577.52, 3,558.68 and 1,978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.52 : 3,558.68 = 1,978.92 : x
2. Step 2: Convert to fraction form
   2,577.52/3,558.68 = 1,978.92/x
3. Step 3: Cross multiply
   2,577.52x = 3,558.68 × 1,978.92
4. Step 4: Simplify right side
   2,577.52x = 7,042,343.03
5. Step 5: Solve for x
   x = 7,042,343.03/2,577.52
6. Step 6: Final answer
   x = 2,732.22