Finding the Fourth Proportional to 12,931.16, 19,392.53 and 4,164.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.16 : 19,392.53 = 4,164.02 : x
2. Step 2: Convert to fraction form
   12,931.16/19,392.53 = 4,164.02/x
3. Step 3: Cross multiply
   12,931.16x = 19,392.53 × 4,164.02
4. Step 4: Simplify right side
   12,931.16x = 80,750,910.43
5. Step 5: Solve for x
   x = 80,750,910.43/12,931.16
6. Step 6: Final answer
   x = 6,244.68