Finding the Fourth Proportional to 2,097.78, 2,895.39 and 1,398.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.78 : 2,895.39 = 1,398.75 : x
2. Step 2: Convert to fraction form
   2,097.78/2,895.39 = 1,398.75/x
3. Step 3: Cross multiply
   2,097.78x = 2,895.39 × 1,398.75
4. Step 4: Simplify right side
   2,097.78x = 4,049,926.76
5. Step 5: Solve for x
   x = 4,049,926.76/2,097.78
6. Step 6: Final answer
   x = 1,930.58