Finding the Fourth Proportional to 1,411.99, 2,118.71 and 672.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.99 : 2,118.71 = 672.44 : x
2. Step 2: Convert to fraction form
   1,411.99/2,118.71 = 672.44/x
3. Step 3: Cross multiply
   1,411.99x = 2,118.71 × 672.44
4. Step 4: Simplify right side
   1,411.99x = 1,424,701.86
5. Step 5: Solve for x
   x = 1,424,701.86/1,411.99
6. Step 6: Final answer
   x = 1,009.00