Finding the Fourth Proportional to 1,212.20, 1,819.38 and 627.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212.20 : 1,819.38 = 627.62 : x
2. Step 2: Convert to fraction form
   1,212.20/1,819.38 = 627.62/x
3. Step 3: Cross multiply
   1,212.20x = 1,819.38 × 627.62
4. Step 4: Simplify right side
   1,212.20x = 1,141,870.18
5. Step 5: Solve for x
   x = 1,141,870.18/1,212.20
6. Step 6: Final answer
   x = 941.99