Finding the Fourth Proportional to 1,181.56, 1,630.56 and 657.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.56 : 1,630.56 = 657.59 : x
2. Step 2: Convert to fraction form
   1,181.56/1,630.56 = 657.59/x
3. Step 3: Cross multiply
   1,181.56x = 1,630.56 × 657.59
4. Step 4: Simplify right side
   1,181.56x = 1,072,239.95
5. Step 5: Solve for x
   x = 1,072,239.95/1,181.56
6. Step 6: Final answer
   x = 907.48