Finding the Fourth Proportional to 1,056.96, 1,458.56 and 614.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.96 : 1,458.56 = 614.88 : x
2. Step 2: Convert to fraction form
   1,056.96/1,458.56 = 614.88/x
3. Step 3: Cross multiply
   1,056.96x = 1,458.56 × 614.88
4. Step 4: Simplify right side
   1,056.96x = 896,839.37
5. Step 5: Solve for x
   x = 896,839.37/1,056.96
6. Step 6: Final answer
   x = 848.51