Finding the Fourth Proportional to 1,064.05, 1,468.39 and 621.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.05 : 1,468.39 = 621.86 : x
2. Step 2: Convert to fraction form
   1,064.05/1,468.39 = 621.86/x
3. Step 3: Cross multiply
   1,064.05x = 1,468.39 × 621.86
4. Step 4: Simplify right side
   1,064.05x = 913,133.57
5. Step 5: Solve for x
   x = 913,133.57/1,064.05
6. Step 6: Final answer
   x = 858.17