Finding the Fourth Proportional to 1,063.89, 1,468.17 and 621.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.89 : 1,468.17 = 621.71 : x
2. Step 2: Convert to fraction form
   1,063.89/1,468.17 = 621.71/x
3. Step 3: Cross multiply
   1,063.89x = 1,468.17 × 621.71
4. Step 4: Simplify right side
   1,063.89x = 912,775.97
5. Step 5: Solve for x
   x = 912,775.97/1,063.89
6. Step 6: Final answer
   x = 857.96