Finding the Fourth Proportional to 1,036.30, 1,429.74 and 616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.30 : 1,429.74 = 616.72 : x
2. Step 2: Convert to fraction form
   1,036.30/1,429.74 = 616.72/x
3. Step 3: Cross multiply
   1,036.30x = 1,429.74 × 616.72
4. Step 4: Simplify right side
   1,036.30x = 881,749.25
5. Step 5: Solve for x
   x = 881,749.25/1,036.30
6. Step 6: Final answer
   x = 850.86