Finding the Fourth Proportional to 139,087.05, 191,940.18 and 75,424.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,087.05 : 191,940.18 = 75,424.83 : x
2. Step 2: Convert to fraction form
   139,087.05/191,940.18 = 75,424.83/x
3. Step 3: Cross multiply
   139,087.05x = 191,940.18 × 75,424.83
4. Step 4: Simplify right side
   139,087.05x = 14,477,055,446.67
5. Step 5: Solve for x
   x = 14,477,055,446.67/139,087.05
6. Step 6: Final answer
   x = 104,086.29