Finding the Fourth Proportional to 20,780.93, 31,152.56 and 8,298.32

Step by Step Solution

1. Step 1: Write the proportion equation
   20,780.93 : 31,152.56 = 8,298.32 : x
2. Step 2: Convert to fraction form
   20,780.93/31,152.56 = 8,298.32/x
3. Step 3: Cross multiply
   20,780.93x = 31,152.56 × 8,298.32
4. Step 4: Simplify right side
   20,780.93x = 258,513,911.70
5. Step 5: Solve for x
   x = 258,513,911.70/20,780.93
6. Step 6: Final answer
   x = 12,439.96