Finding the Fourth Proportional to 1,047.74, 1,445.57 and 627.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.74 : 1,445.57 = 627.89 : x
2. Step 2: Convert to fraction form
   1,047.74/1,445.57 = 627.89/x
3. Step 3: Cross multiply
   1,047.74x = 1,445.57 × 627.89
4. Step 4: Simplify right side
   1,047.74x = 907,659.42
5. Step 5: Solve for x
   x = 907,659.42/1,047.74
6. Step 6: Final answer
   x = 866.30