Finding the Fourth Proportional to 1,150.02, 1,723.49 and 418.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.02 : 1,723.49 = 418.91 : x
2. Step 2: Convert to fraction form
   1,150.02/1,723.49 = 418.91/x
3. Step 3: Cross multiply
   1,150.02x = 1,723.49 × 418.91
4. Step 4: Simplify right side
   1,150.02x = 721,978.58
5. Step 5: Solve for x
   x = 721,978.58/1,150.02
6. Step 6: Final answer
   x = 627.80