Finding the Fourth Proportional to 1,500.55, 2,250.64 and 404.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.55 : 2,250.64 = 404.99 : x
2. Step 2: Convert to fraction form
   1,500.55/2,250.64 = 404.99/x
3. Step 3: Cross multiply
   1,500.55x = 2,250.64 × 404.99
4. Step 4: Simplify right side
   1,500.55x = 911,491.31
5. Step 5: Solve for x
   x = 911,491.31/1,500.55
6. Step 6: Final answer
   x = 607.44