Finding the Fourth Proportional to 2,285.64, 3,429.18 and 747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.64 : 3,429.18 = 747.72 : x
2. Step 2: Convert to fraction form
   2,285.64/3,429.18 = 747.72/x
3. Step 3: Cross multiply
   2,285.64x = 3,429.18 × 747.72
4. Step 4: Simplify right side
   2,285.64x = 2,564,066.47
5. Step 5: Solve for x
   x = 2,564,066.47/2,285.64
6. Step 6: Final answer
   x = 1,121.82