Finding the Fourth Proportional to 1,291.93, 1,782.89 and 702.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.93 : 1,782.89 = 702.50 : x
2. Step 2: Convert to fraction form
   1,291.93/1,782.89 = 702.50/x
3. Step 3: Cross multiply
   1,291.93x = 1,782.89 × 702.50
4. Step 4: Simplify right side
   1,291.93x = 1,252,470.43
5. Step 5: Solve for x
   x = 1,252,470.43/1,291.93
6. Step 6: Final answer
   x = 969.46