Finding the Fourth Proportional to 1,181.83, 1,630.94 and 657.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.83 : 1,630.94 = 657.86 : x
2. Step 2: Convert to fraction form
   1,181.83/1,630.94 = 657.86/x
3. Step 3: Cross multiply
   1,181.83x = 1,630.94 × 657.86
4. Step 4: Simplify right side
   1,181.83x = 1,072,930.98
5. Step 5: Solve for x
   x = 1,072,930.98/1,181.83
6. Step 6: Final answer
   x = 907.85