Finding the Fourth Proportional to 3,948.27, 5,920.35 and 1,314.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.27 : 5,920.35 = 1,314.81 : x
2. Step 2: Convert to fraction form
   3,948.27/5,920.35 = 1,314.81/x
3. Step 3: Cross multiply
   3,948.27x = 5,920.35 × 1,314.81
4. Step 4: Simplify right side
   3,948.27x = 7,784,135.38
5. Step 5: Solve for x
   x = 7,784,135.38/3,948.27
6. Step 6: Final answer
   x = 1,971.53