Finding the Fourth Proportional to 1,111.94, 1,669.28 and 702.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.94 : 1,669.28 = 702.79 : x
2. Step 2: Convert to fraction form
   1,111.94/1,669.28 = 702.79/x
3. Step 3: Cross multiply
   1,111.94x = 1,669.28 × 702.79
4. Step 4: Simplify right side
   1,111.94x = 1,173,145.60
5. Step 5: Solve for x
   x = 1,173,145.60/1,111.94
6. Step 6: Final answer
   x = 1,055.05