Finding the Fourth Proportional to 1,397.34, 1,928.23 and 838.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.34 : 1,928.23 = 838.08 : x
2. Step 2: Convert to fraction form
   1,397.34/1,928.23 = 838.08/x
3. Step 3: Cross multiply
   1,397.34x = 1,928.23 × 838.08
4. Step 4: Simplify right side
   1,397.34x = 1,616,011.00
5. Step 5: Solve for x
   x = 1,616,011.00/1,397.34
6. Step 6: Final answer
   x = 1,156.49