Finding the Fourth Proportional to 1,146.08, 1,581.56 and 622.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.08 : 1,581.56 = 622.10 : x
2. Step 2: Convert to fraction form
   1,146.08/1,581.56 = 622.10/x
3. Step 3: Cross multiply
   1,146.08x = 1,581.56 × 622.10
4. Step 4: Simplify right side
   1,146.08x = 983,888.48
5. Step 5: Solve for x
   x = 983,888.48/1,146.08
6. Step 6: Final answer
   x = 858.48