Finding the Fourth Proportional to 1,118.82, 1,677.69 and 631.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.82 : 1,677.69 = 631.74 : x
2. Step 2: Convert to fraction form
   1,118.82/1,677.69 = 631.74/x
3. Step 3: Cross multiply
   1,118.82x = 1,677.69 × 631.74
4. Step 4: Simplify right side
   1,118.82x = 1,059,863.88
5. Step 5: Solve for x
   x = 1,059,863.88/1,118.82
6. Step 6: Final answer
   x = 947.31