Finding the Fourth Proportional to 139,061.07, 191,904.39 and 75,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,061.07 : 191,904.39 = 75,399.12 : x
2. Step 2: Convert to fraction form
   139,061.07/191,904.39 = 75,399.12/x
3. Step 3: Cross multiply
   139,061.07x = 191,904.39 × 75,399.12
4. Step 4: Simplify right side
   139,061.07x = 14,469,422,130.14
5. Step 5: Solve for x
   x = 14,469,422,130.14/139,061.07
6. Step 6: Final answer
   x = 104,050.85