Finding the Fourth Proportional to 1,036.50, 1,430.41 and 622.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.50 : 1,430.41 = 622.74 : x
2. Step 2: Convert to fraction form
   1,036.50/1,430.41 = 622.74/x
3. Step 3: Cross multiply
   1,036.50x = 1,430.41 × 622.74
4. Step 4: Simplify right side
   1,036.50x = 890,773.52
5. Step 5: Solve for x
   x = 890,773.52/1,036.50
6. Step 6: Final answer
   x = 859.41