Finding the Fourth Proportional to 1,181.59, 1,630.59 and 657.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.59 : 1,630.59 = 657.65 : x
2. Step 2: Convert to fraction form
   1,181.59/1,630.59 = 657.65/x
3. Step 3: Cross multiply
   1,181.59x = 1,630.59 × 657.65
4. Step 4: Simplify right side
   1,181.59x = 1,072,357.51
5. Step 5: Solve for x
   x = 1,072,357.51/1,181.59
6. Step 6: Final answer
   x = 907.55