Finding the Fourth Proportional to 1,150.55, 1,587.78 and 626.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.55 : 1,587.78 = 626.59 : x
2. Step 2: Convert to fraction form
   1,150.55/1,587.78 = 626.59/x
3. Step 3: Cross multiply
   1,150.55x = 1,587.78 × 626.59
4. Step 4: Simplify right side
   1,150.55x = 994,887.07
5. Step 5: Solve for x
   x = 994,887.07/1,150.55
6. Step 6: Final answer
   x = 864.71