Finding the Fourth Proportional to 1,397.97, 1,929.30 and 925.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.97 : 1,929.30 = 925.05 : x
2. Step 2: Convert to fraction form
   1,397.97/1,929.30 = 925.05/x
3. Step 3: Cross multiply
   1,397.97x = 1,929.30 × 925.05
4. Step 4: Simplify right side
   1,397.97x = 1,784,698.97
5. Step 5: Solve for x
   x = 1,784,698.97/1,397.97
6. Step 6: Final answer
   x = 1,276.64