Finding the Fourth Proportional to 1,071.23, 1,477.71 and 629.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.23 : 1,477.71 = 629.06 : x
2. Step 2: Convert to fraction form
   1,071.23/1,477.71 = 629.06/x
3. Step 3: Cross multiply
   1,071.23x = 1,477.71 × 629.06
4. Step 4: Simplify right side
   1,071.23x = 929,560.86
5. Step 5: Solve for x
   x = 929,560.86/1,071.23
6. Step 6: Final answer
   x = 867.76