Finding the Fourth Proportional to 139,018.18, 191,839.94 and 75,354.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,018.18 : 191,839.94 = 75,354.60 : x
2. Step 2: Convert to fraction form
   139,018.18/191,839.94 = 75,354.60/x
3. Step 3: Cross multiply
   139,018.18x = 191,839.94 × 75,354.60
4. Step 4: Simplify right side
   139,018.18x = 14,456,021,942.72
5. Step 5: Solve for x
   x = 14,456,021,942.72/139,018.18
6. Step 6: Final answer
   x = 103,986.56