Finding the Fourth Proportional to 1,404.88, 2,107.28 and 672.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.88 : 2,107.28 = 672.24 : x
2. Step 2: Convert to fraction form
   1,404.88/2,107.28 = 672.24/x
3. Step 3: Cross multiply
   1,404.88x = 2,107.28 × 672.24
4. Step 4: Simplify right side
   1,404.88x = 1,416,597.91
5. Step 5: Solve for x
   x = 1,416,597.91/1,404.88
6. Step 6: Final answer
   x = 1,008.34