Finding the Fourth Proportional to 89,940.86, 124,228.83 and 67,380.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,940.86 : 124,228.83 = 67,380.78 : x
2. Step 2: Convert to fraction form
   89,940.86/124,228.83 = 67,380.78/x
3. Step 3: Cross multiply
   89,940.86x = 124,228.83 × 67,380.78
4. Step 4: Simplify right side
   89,940.86x = 8,370,635,463.89
5. Step 5: Solve for x
   x = 8,370,635,463.89/89,940.86
6. Step 6: Final answer
   x = 93,068.22