Finding the Fourth Proportional to 1,124.31, 1,551.69 and 704.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.31 : 1,551.69 = 704.78 : x
2. Step 2: Convert to fraction form
   1,124.31/1,551.69 = 704.78/x
3. Step 3: Cross multiply
   1,124.31x = 1,551.69 × 704.78
4. Step 4: Simplify right side
   1,124.31x = 1,093,600.08
5. Step 5: Solve for x
   x = 1,093,600.08/1,124.31
6. Step 6: Final answer
   x = 972.69