Finding the Fourth Proportional to 2,287.36, 3,432.12 and 1,117.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.36 : 3,432.12 = 1,117.72 : x
2. Step 2: Convert to fraction form
   2,287.36/3,432.12 = 1,117.72/x
3. Step 3: Cross multiply
   2,287.36x = 3,432.12 × 1,117.72
4. Step 4: Simplify right side
   2,287.36x = 3,836,149.17
5. Step 5: Solve for x
   x = 3,836,149.17/2,287.36
6. Step 6: Final answer
   x = 1,677.11