Finding the Fourth Proportional to 101,336.57, 139,951.90 and 77,089.62

Step by Step Solution

1. Step 1: Write the proportion equation
   101,336.57 : 139,951.90 = 77,089.62 : x
2. Step 2: Convert to fraction form
   101,336.57/139,951.90 = 77,089.62/x
3. Step 3: Cross multiply
   101,336.57x = 139,951.90 × 77,089.62
4. Step 4: Simplify right side
   101,336.57x = 10,788,839,410.46
5. Step 5: Solve for x
   x = 10,788,839,410.46/101,336.57
6. Step 6: Final answer
   x = 106,465.41