Finding the Fourth Proportional to 1,402.80, 2,104.72 and 672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.80 : 2,104.72 = 672.96 : x
2. Step 2: Convert to fraction form
   1,402.80/2,104.72 = 672.96/x
3. Step 3: Cross multiply
   1,402.80x = 2,104.72 × 672.96
4. Step 4: Simplify right side
   1,402.80x = 1,416,392.37
5. Step 5: Solve for x
   x = 1,416,392.37/1,402.80
6. Step 6: Final answer
   x = 1,009.69