Finding the Fourth Proportional to 1,031.50, 1,423.53 and 611.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.50 : 1,423.53 = 611.79 : x
2. Step 2: Convert to fraction form
   1,031.50/1,423.53 = 611.79/x
3. Step 3: Cross multiply
   1,031.50x = 1,423.53 × 611.79
4. Step 4: Simplify right side
   1,031.50x = 870,901.42
5. Step 5: Solve for x
   x = 870,901.42/1,031.50
6. Step 6: Final answer
   x = 844.31