Finding the Fourth Proportional to 1,077.62, 1,616.59 and 308.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.62 : 1,616.59 = 308.10 : x
2. Step 2: Convert to fraction form
   1,077.62/1,616.59 = 308.10/x
3. Step 3: Cross multiply
   1,077.62x = 1,616.59 × 308.10
4. Step 4: Simplify right side
   1,077.62x = 498,071.38
5. Step 5: Solve for x
   x = 498,071.38/1,077.62
6. Step 6: Final answer
   x = 462.20