Finding the Fourth Proportional to 14,312.42, 19,751.31 and 7,939.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,312.42 : 19,751.31 = 7,939.15 : x
2. Step 2: Convert to fraction form
   14,312.42/19,751.31 = 7,939.15/x
3. Step 3: Cross multiply
   14,312.42x = 19,751.31 × 7,939.15
4. Step 4: Simplify right side
   14,312.42x = 156,808,612.79
5. Step 5: Solve for x
   x = 156,808,612.79/14,312.42
6. Step 6: Final answer
   x = 10,956.12