Finding the Fourth Proportional to 1,056.60, 1,458.32 and 614.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.60 : 1,458.32 = 614.47 : x
2. Step 2: Convert to fraction form
   1,056.60/1,458.32 = 614.47/x
3. Step 3: Cross multiply
   1,056.60x = 1,458.32 × 614.47
4. Step 4: Simplify right side
   1,056.60x = 896,093.89
5. Step 5: Solve for x
   x = 896,093.89/1,056.60
6. Step 6: Final answer
   x = 848.09