Finding the Fourth Proportional to 1,411.86, 2,118.20 and 672.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.86 : 2,118.20 = 672.03 : x
2. Step 2: Convert to fraction form
   1,411.86/2,118.20 = 672.03/x
3. Step 3: Cross multiply
   1,411.86x = 2,118.20 × 672.03
4. Step 4: Simplify right side
   1,411.86x = 1,423,493.95
5. Step 5: Solve for x
   x = 1,423,493.95/1,411.86
6. Step 6: Final answer
   x = 1,008.24