Finding the Fourth Proportional to 1,097.72, 1,514.42 and 631.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.72 : 1,514.42 = 631.88 : x
2. Step 2: Convert to fraction form
   1,097.72/1,514.42 = 631.88/x
3. Step 3: Cross multiply
   1,097.72x = 1,514.42 × 631.88
4. Step 4: Simplify right side
   1,097.72x = 956,931.71
5. Step 5: Solve for x
   x = 956,931.71/1,097.72
6. Step 6: Final answer
   x = 871.74