Finding the Fourth Proportional to 1,181.89, 1,631.12 and 657.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.89 : 1,631.12 = 657.92 : x
2. Step 2: Convert to fraction form
   1,181.89/1,631.12 = 657.92/x
3. Step 3: Cross multiply
   1,181.89x = 1,631.12 × 657.92
4. Step 4: Simplify right side
   1,181.89x = 1,073,150.96
5. Step 5: Solve for x
   x = 1,073,150.96/1,181.89
6. Step 6: Final answer
   x = 907.99