Finding the Fourth Proportional to 1,200.99, 1,801.61 and 335.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.99 : 1,801.61 = 335.30 : x
2. Step 2: Convert to fraction form
   1,200.99/1,801.61 = 335.30/x
3. Step 3: Cross multiply
   1,200.99x = 1,801.61 × 335.30
4. Step 4: Simplify right side
   1,200.99x = 604,079.83
5. Step 5: Solve for x
   x = 604,079.83/1,200.99
6. Step 6: Final answer
   x = 502.98