Finding the Fourth Proportional to 2,178.28, 3,008.19 and 1,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.28 : 3,008.19 = 1,432.72 : x
2. Step 2: Convert to fraction form
   2,178.28/3,008.19 = 1,432.72/x
3. Step 3: Cross multiply
   2,178.28x = 3,008.19 × 1,432.72
4. Step 4: Simplify right side
   2,178.28x = 4,309,893.98
5. Step 5: Solve for x
   x = 4,309,893.98/2,178.28
6. Step 6: Final answer
   x = 1,978.58