Finding the Fourth Proportional to 123,975.42, 171,086.70 and 67,386.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,975.42 : 171,086.70 = 67,386.78 : x
2. Step 2: Convert to fraction form
   123,975.42/171,086.70 = 67,386.78/x
3. Step 3: Cross multiply
   123,975.42x = 171,086.70 × 67,386.78
4. Step 4: Simplify right side
   123,975.42x = 11,528,981,813.83
5. Step 5: Solve for x
   x = 11,528,981,813.83/123,975.42
6. Step 6: Final answer
   x = 92,994.09