Finding the Fourth Proportional to 1,219.59, 1,830.42 and 603.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.59 : 1,830.42 = 603.99 : x
2. Step 2: Convert to fraction form
   1,219.59/1,830.42 = 603.99/x
3. Step 3: Cross multiply
   1,219.59x = 1,830.42 × 603.99
4. Step 4: Simplify right side
   1,219.59x = 1,105,555.38
5. Step 5: Solve for x
   x = 1,105,555.38/1,219.59
6. Step 6: Final answer
   x = 906.50