Finding the Fourth Proportional to 2,432.80, 3,642.72 and 1,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,432.80 : 3,642.72 = 1,276.12 : x
2. Step 2: Convert to fraction form
   2,432.80/3,642.72 = 1,276.12/x
3. Step 3: Cross multiply
   2,432.80x = 3,642.72 × 1,276.12
4. Step 4: Simplify right side
   2,432.80x = 4,648,547.85
5. Step 5: Solve for x
   x = 4,648,547.85/2,432.80
6. Step 6: Final answer
   x = 1,910.78