Finding the Fourth Proportional to 101,081.39, 139,499.21 and 58,639.92

Step by Step Solution

1. Step 1: Write the proportion equation
   101,081.39 : 139,499.21 = 58,639.92 : x
2. Step 2: Convert to fraction form
   101,081.39/139,499.21 = 58,639.92/x
3. Step 3: Cross multiply
   101,081.39x = 139,499.21 × 58,639.92
4. Step 4: Simplify right side
   101,081.39x = 8,180,222,137.94
5. Step 5: Solve for x
   x = 8,180,222,137.94/101,081.39
6. Step 6: Final answer
   x = 80,927.09