Finding the Fourth Proportional to 1,150.32, 1,726.20 and 419.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.32 : 1,726.20 = 419.88 : x
2. Step 2: Convert to fraction form
   1,150.32/1,726.20 = 419.88/x
3. Step 3: Cross multiply
   1,150.32x = 1,726.20 × 419.88
4. Step 4: Simplify right side
   1,150.32x = 724,796.86
5. Step 5: Solve for x
   x = 724,796.86/1,150.32
6. Step 6: Final answer
   x = 630.08