Finding the Fourth Proportional to 1,398.88, 2,097.72 and 704.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.88 : 2,097.72 = 704.68 : x
2. Step 2: Convert to fraction form
   1,398.88/2,097.72 = 704.68/x
3. Step 3: Cross multiply
   1,398.88x = 2,097.72 × 704.68
4. Step 4: Simplify right side
   1,398.88x = 1,478,221.33
5. Step 5: Solve for x
   x = 1,478,221.33/1,398.88
6. Step 6: Final answer
   x = 1,056.72