Finding the Fourth Proportional to 630.81, 870.52 and 368.83

Step by Step Solution

1. Step 1: Write the proportion equation
   630.81 : 870.52 = 368.83 : x
2. Step 2: Convert to fraction form
   630.81/870.52 = 368.83/x
3. Step 3: Cross multiply
   630.81x = 870.52 × 368.83
4. Step 4: Simplify right side
   630.81x = 321,073.89
5. Step 5: Solve for x
   x = 321,073.89/630.81
6. Step 6: Final answer
   x = 508.99