Finding the Fourth Proportional to 105,016.77, 144,917.91 and 59,688.81

Step by Step Solution

1. Step 1: Write the proportion equation
   105,016.77 : 144,917.91 = 59,688.81 : x
2. Step 2: Convert to fraction form
   105,016.77/144,917.91 = 59,688.81/x
3. Step 3: Cross multiply
   105,016.77x = 144,917.91 × 59,688.81
4. Step 4: Simplify right side
   105,016.77x = 8,649,977,595.59
5. Step 5: Solve for x
   x = 8,649,977,595.59/105,016.77
6. Step 6: Final answer
   x = 82,367.58