Finding the Fourth Proportional to 1,064.12, 1,468.04 and 621.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.12 : 1,468.04 = 621.86 : x
2. Step 2: Convert to fraction form
   1,064.12/1,468.04 = 621.86/x
3. Step 3: Cross multiply
   1,064.12x = 1,468.04 × 621.86
4. Step 4: Simplify right side
   1,064.12x = 912,915.35
5. Step 5: Solve for x
   x = 912,915.35/1,064.12
6. Step 6: Final answer
   x = 857.91