Finding the Fourth Proportional to 1,078.55, 1,487.61 and 704.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.55 : 1,487.61 = 704.93 : x
2. Step 2: Convert to fraction form
   1,078.55/1,487.61 = 704.93/x
3. Step 3: Cross multiply
   1,078.55x = 1,487.61 × 704.93
4. Step 4: Simplify right side
   1,078.55x = 1,048,660.92
5. Step 5: Solve for x
   x = 1,048,660.92/1,078.55
6. Step 6: Final answer
   x = 972.29