Finding the Fourth Proportional to 1,056.27, 1,458.16 and 702.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.27 : 1,458.16 = 702.78 : x
2. Step 2: Convert to fraction form
   1,056.27/1,458.16 = 702.78/x
3. Step 3: Cross multiply
   1,056.27x = 1,458.16 × 702.78
4. Step 4: Simplify right side
   1,056.27x = 1,024,754.88
5. Step 5: Solve for x
   x = 1,024,754.88/1,056.27
6. Step 6: Final answer
   x = 970.17