Finding the Fourth Proportional to 1,292.10, 1,783.10 and 702.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,292.10 : 1,783.10 = 702.62 : x
2. Step 2: Convert to fraction form
   1,292.10/1,783.10 = 702.62/x
3. Step 3: Cross multiply
   1,292.10x = 1,783.10 × 702.62
4. Step 4: Simplify right side
   1,292.10x = 1,252,838.21
5. Step 5: Solve for x
   x = 1,252,838.21/1,292.10
6. Step 6: Final answer
   x = 969.62