Finding the Fourth Proportional to 20,848.42, 31,281.32 and 8,377.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,848.42 : 31,281.32 = 8,377.31 : x
2. Step 2: Convert to fraction form
   20,848.42/31,281.32 = 8,377.31/x
3. Step 3: Cross multiply
   20,848.42x = 31,281.32 × 8,377.31
4. Step 4: Simplify right side
   20,848.42x = 262,053,314.85
5. Step 5: Solve for x
   x = 262,053,314.85/20,848.42
6. Step 6: Final answer
   x = 12,569.46