Finding the Fourth Proportional to 1,078.04, 1,615.89 and 707.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.04 : 1,615.89 = 707.69 : x
2. Step 2: Convert to fraction form
   1,078.04/1,615.89 = 707.69/x
3. Step 3: Cross multiply
   1,078.04x = 1,615.89 × 707.69
4. Step 4: Simplify right side
   1,078.04x = 1,143,549.19
5. Step 5: Solve for x
   x = 1,143,549.19/1,078.04
6. Step 6: Final answer
   x = 1,060.77