Finding the Fourth Proportional to 105,787.77, 145,997 and 60,456.89

Step by Step Solution

1. Step 1: Write the proportion equation
   105,787.77 : 145,997 = 60,456.89 : x
2. Step 2: Convert to fraction form
   105,787.77/145,997 = 60,456.89/x
3. Step 3: Cross multiply
   105,787.77x = 145,997 × 60,456.89
4. Step 4: Simplify right side
   105,787.77x = 8,826,524,569.33
5. Step 5: Solve for x
   x = 8,826,524,569.33/105,787.77
6. Step 6: Final answer
   x = 83,436.16