Finding the Fourth Proportional to 1,063.88, 1,468.23 and 621.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.88 : 1,468.23 = 621.89 : x
2. Step 2: Convert to fraction form
   1,063.88/1,468.23 = 621.89/x
3. Step 3: Cross multiply
   1,063.88x = 1,468.23 × 621.89
4. Step 4: Simplify right side
   1,063.88x = 913,077.55
5. Step 5: Solve for x
   x = 913,077.55/1,063.88
6. Step 6: Final answer
   x = 858.25