Finding the Fourth Proportional to 139,072.89, 191,920.56 and 75,410.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,072.89 : 191,920.56 = 75,410.73 : x
2. Step 2: Convert to fraction form
   139,072.89/191,920.56 = 75,410.73/x
3. Step 3: Cross multiply
   139,072.89x = 191,920.56 × 75,410.73
4. Step 4: Simplify right side
   139,072.89x = 14,472,869,531.61
5. Step 5: Solve for x
   x = 14,472,869,531.61/139,072.89
6. Step 6: Final answer
   x = 104,066.79