Finding the Fourth Proportional to 1,500.39, 2,250.72 and 404.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.39 : 2,250.72 = 404.76 : x
2. Step 2: Convert to fraction form
   1,500.39/2,250.72 = 404.76/x
3. Step 3: Cross multiply
   1,500.39x = 2,250.72 × 404.76
4. Step 4: Simplify right side
   1,500.39x = 911,001.43
5. Step 5: Solve for x
   x = 911,001.43/1,500.39
6. Step 6: Final answer
   x = 607.18