Finding the Fourth Proportional to 1,181.98, 1,631.16 and 658

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.98 : 1,631.16 = 658 : x
2. Step 2: Convert to fraction form
   1,181.98/1,631.16 = 658/x
3. Step 3: Cross multiply
   1,181.98x = 1,631.16 × 658
4. Step 4: Simplify right side
   1,181.98x = 1,073,303.28
5. Step 5: Solve for x
   x = 1,073,303.28/1,181.98
6. Step 6: Final answer
   x = 908.06