Finding the Fourth Proportional to 1,047.42, 1,445.41 and 628.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.42 : 1,445.41 = 628.01 : x
2. Step 2: Convert to fraction form
   1,047.42/1,445.41 = 628.01/x
3. Step 3: Cross multiply
   1,047.42x = 1,445.41 × 628.01
4. Step 4: Simplify right side
   1,047.42x = 907,730.91
5. Step 5: Solve for x
   x = 907,730.91/1,047.42
6. Step 6: Final answer
   x = 866.64