Finding the Fourth Proportional to 1,070.47, 1,477.83 and 628.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.47 : 1,477.83 = 628.37 : x
2. Step 2: Convert to fraction form
   1,070.47/1,477.83 = 628.37/x
3. Step 3: Cross multiply
   1,070.47x = 1,477.83 × 628.37
4. Step 4: Simplify right side
   1,070.47x = 928,624.04
5. Step 5: Solve for x
   x = 928,624.04/1,070.47
6. Step 6: Final answer
   x = 867.49