Finding the Fourth Proportional to 1,071.87, 1,479.32 and 629.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.87 : 1,479.32 = 629.82 : x
2. Step 2: Convert to fraction form
   1,071.87/1,479.32 = 629.82/x
3. Step 3: Cross multiply
   1,071.87x = 1,479.32 × 629.82
4. Step 4: Simplify right side
   1,071.87x = 931,705.32
5. Step 5: Solve for x
   x = 931,705.32/1,071.87
6. Step 6: Final answer
   x = 869.23