Finding the Fourth Proportional to 866.52, 1,196.59 and 631.83

Step by Step Solution

1. Step 1: Write the proportion equation
   866.52 : 1,196.59 = 631.83 : x
2. Step 2: Convert to fraction form
   866.52/1,196.59 = 631.83/x
3. Step 3: Cross multiply
   866.52x = 1,196.59 × 631.83
4. Step 4: Simplify right side
   866.52x = 756,041.46
5. Step 5: Solve for x
   x = 756,041.46/866.52
6. Step 6: Final answer
   x = 872.50