Finding the Fourth Proportional to 13,284.27, 19,930.55 and 8,347.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,284.27 : 19,930.55 = 8,347.10 : x
2. Step 2: Convert to fraction form
   13,284.27/19,930.55 = 8,347.10/x
3. Step 3: Cross multiply
   13,284.27x = 19,930.55 × 8,347.10
4. Step 4: Simplify right side
   13,284.27x = 166,362,152.52
5. Step 5: Solve for x
   x = 166,362,152.52/13,284.27
6. Step 6: Final answer
   x = 12,523.24