Finding the Fourth Proportional to 1,123.81, 1,550.86 and 626.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.81 : 1,550.86 = 626.47 : x
2. Step 2: Convert to fraction form
   1,123.81/1,550.86 = 626.47/x
3. Step 3: Cross multiply
   1,123.81x = 1,550.86 × 626.47
4. Step 4: Simplify right side
   1,123.81x = 971,561.82
5. Step 5: Solve for x
   x = 971,561.82/1,123.81
6. Step 6: Final answer
   x = 864.53