Finding the Fourth Proportional to 1,070.06, 1,476.60 and 627.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.06 : 1,476.60 = 627.89 : x
2. Step 2: Convert to fraction form
   1,070.06/1,476.60 = 627.89/x
3. Step 3: Cross multiply
   1,070.06x = 1,476.60 × 627.89
4. Step 4: Simplify right side
   1,070.06x = 927,142.37
5. Step 5: Solve for x
   x = 927,142.37/1,070.06
6. Step 6: Final answer
   x = 866.44