Finding the Fourth Proportional to 1,293.25, 1,784.61 and 703.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.25 : 1,784.61 = 703.78 : x
2. Step 2: Convert to fraction form
   1,293.25/1,784.61 = 703.78/x
3. Step 3: Cross multiply
   1,293.25x = 1,784.61 × 703.78
4. Step 4: Simplify right side
   1,293.25x = 1,255,969.31
5. Step 5: Solve for x
   x = 1,255,969.31/1,293.25
6. Step 6: Final answer
   x = 971.18