Finding the Fourth Proportional to 1,617.33, 2,232.27 and 1,056.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.33 : 2,232.27 = 1,056.78 : x
2. Step 2: Convert to fraction form
   1,617.33/2,232.27 = 1,056.78/x
3. Step 3: Cross multiply
   1,617.33x = 2,232.27 × 1,056.78
4. Step 4: Simplify right side
   1,617.33x = 2,359,018.29
5. Step 5: Solve for x
   x = 2,359,018.29/1,617.33
6. Step 6: Final answer
   x = 1,458.59