Finding the Fourth Proportional to 1,031.81, 1,423.31 and 633.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.81 : 1,423.31 = 633.42 : x
2. Step 2: Convert to fraction form
   1,031.81/1,423.31 = 633.42/x
3. Step 3: Cross multiply
   1,031.81x = 1,423.31 × 633.42
4. Step 4: Simplify right side
   1,031.81x = 901,549.85
5. Step 5: Solve for x
   x = 901,549.85/1,031.81
6. Step 6: Final answer
   x = 873.76