Finding the Fourth Proportional to 1,292.56, 1,783.72 and 703.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,292.56 : 1,783.72 = 703.09 : x
2. Step 2: Convert to fraction form
   1,292.56/1,783.72 = 703.09/x
3. Step 3: Cross multiply
   1,292.56x = 1,783.72 × 703.09
4. Step 4: Simplify right side
   1,292.56x = 1,254,115.69
5. Step 5: Solve for x
   x = 1,254,115.69/1,292.56
6. Step 6: Final answer
   x = 970.26