Finding the Fourth Proportional to 12,931.83, 19,392.87 and 4,164.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.83 : 19,392.87 = 4,164.39 : x
2. Step 2: Convert to fraction form
   12,931.83/19,392.87 = 4,164.39/x
3. Step 3: Cross multiply
   12,931.83x = 19,392.87 × 4,164.39
4. Step 4: Simplify right side
   12,931.83x = 80,759,473.90
5. Step 5: Solve for x
   x = 80,759,473.90/12,931.83
6. Step 6: Final answer
   x = 6,245.02