Finding the Fourth Proportional to 1,379.38, 1,904.34 and 848.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.38 : 1,904.34 = 848.48 : x
2. Step 2: Convert to fraction form
   1,379.38/1,904.34 = 848.48/x
3. Step 3: Cross multiply
   1,379.38x = 1,904.34 × 848.48
4. Step 4: Simplify right side
   1,379.38x = 1,615,788.06
5. Step 5: Solve for x
   x = 1,615,788.06/1,379.38
6. Step 6: Final answer
   x = 1,171.39