Finding the Fourth Proportional to 1,077.12, 1,613.61 and 614.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.12 : 1,613.61 = 614.16 : x
2. Step 2: Convert to fraction form
   1,077.12/1,613.61 = 614.16/x
3. Step 3: Cross multiply
   1,077.12x = 1,613.61 × 614.16
4. Step 4: Simplify right side
   1,077.12x = 991,014.72
5. Step 5: Solve for x
   x = 991,014.72/1,077.12
6. Step 6: Final answer
   x = 920.06