Finding the Fourth Proportional to 105,343.77, 145,338.78 and 59,989.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,343.77 : 145,338.78 = 59,989.61 : x
2. Step 2: Convert to fraction form
   105,343.77/145,338.78 = 59,989.61/x
3. Step 3: Cross multiply
   105,343.77x = 145,338.78 × 59,989.61
4. Step 4: Simplify right side
   105,343.77x = 8,718,816,003.38
5. Step 5: Solve for x
   x = 8,718,816,003.38/105,343.77
6. Step 6: Final answer
   x = 82,765.37