Finding the Fourth Proportional to 1,397.19, 1,928.31 and 925.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.19 : 1,928.31 = 925.02 : x
2. Step 2: Convert to fraction form
   1,397.19/1,928.31 = 925.02/x
3. Step 3: Cross multiply
   1,397.19x = 1,928.31 × 925.02
4. Step 4: Simplify right side
   1,397.19x = 1,783,725.32
5. Step 5: Solve for x
   x = 1,783,725.32/1,397.19
6. Step 6: Final answer
   x = 1,276.65