Finding the Fourth Proportional to 2,651.32, 3,978.80 and 1,353.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.32 : 3,978.80 = 1,353.68 : x
2. Step 2: Convert to fraction form
   2,651.32/3,978.80 = 1,353.68/x
3. Step 3: Cross multiply
   2,651.32x = 3,978.80 × 1,353.68
4. Step 4: Simplify right side
   2,651.32x = 5,386,021.98
5. Step 5: Solve for x
   x = 5,386,021.98/2,651.32
6. Step 6: Final answer
   x = 2,031.45