Finding the Fourth Proportional to 12,796.10, 19,150.80 and 7,868.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.10 : 19,150.80 = 7,868.86 : x
2. Step 2: Convert to fraction form
   12,796.10/19,150.80 = 7,868.86/x
3. Step 3: Cross multiply
   12,796.10x = 19,150.80 × 7,868.86
4. Step 4: Simplify right side
   12,796.10x = 150,694,964.09
5. Step 5: Solve for x
   x = 150,694,964.09/12,796.10
6. Step 6: Final answer
   x = 11,776.63