Finding the Fourth Proportional to 109,936.68, 151,807.31 and 69,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   109,936.68 : 151,807.31 = 69,168.78 : x
2. Step 2: Convert to fraction form
   109,936.68/151,807.31 = 69,168.78/x
3. Step 3: Cross multiply
   109,936.68x = 151,807.31 × 69,168.78
4. Step 4: Simplify right side
   109,936.68x = 10,500,327,169.98
5. Step 5: Solve for x
   x = 10,500,327,169.98/109,936.68
6. Step 6: Final answer
   x = 95,512.50