Finding the Fourth Proportional to 1,096.78, 1,513.47 and 703.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.78 : 1,513.47 = 703.75 : x
2. Step 2: Convert to fraction form
   1,096.78/1,513.47 = 703.75/x
3. Step 3: Cross multiply
   1,096.78x = 1,513.47 × 703.75
4. Step 4: Simplify right side
   1,096.78x = 1,065,104.51
5. Step 5: Solve for x
   x = 1,065,104.51/1,096.78
6. Step 6: Final answer
   x = 971.12