Finding the Fourth Proportional to 1,397.51, 1,928.24 and 807.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.51 : 1,928.24 = 807.94 : x
2. Step 2: Convert to fraction form
   1,397.51/1,928.24 = 807.94/x
3. Step 3: Cross multiply
   1,397.51x = 1,928.24 × 807.94
4. Step 4: Simplify right side
   1,397.51x = 1,557,892.58
5. Step 5: Solve for x
   x = 1,557,892.58/1,397.51
6. Step 6: Final answer
   x = 1,114.77