Finding the Fourth Proportional to 1,123.60, 1,550.58 and 626.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.60 : 1,550.58 = 626.26 : x
2. Step 2: Convert to fraction form
   1,123.60/1,550.58 = 626.26/x
3. Step 3: Cross multiply
   1,123.60x = 1,550.58 × 626.26
4. Step 4: Simplify right side
   1,123.60x = 971,066.23
5. Step 5: Solve for x
   x = 971,066.23/1,123.60
6. Step 6: Final answer
   x = 864.25