Finding the Fourth Proportional to 1,030.41, 1,422.18 and 631.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.41 : 1,422.18 = 631.89 : x
2. Step 2: Convert to fraction form
   1,030.41/1,422.18 = 631.89/x
3. Step 3: Cross multiply
   1,030.41x = 1,422.18 × 631.89
4. Step 4: Simplify right side
   1,030.41x = 898,661.32
5. Step 5: Solve for x
   x = 898,661.32/1,030.41
6. Step 6: Final answer
   x = 872.14