Finding the Fourth Proportional to 139,147.31, 192,023.39 and 75,485.36

Step by Step Solution

1. Step 1: Write the proportion equation
   139,147.31 : 192,023.39 = 75,485.36 : x
2. Step 2: Convert to fraction form
   139,147.31/192,023.39 = 75,485.36/x
3. Step 3: Cross multiply
   139,147.31x = 192,023.39 × 75,485.36
4. Step 4: Simplify right side
   139,147.31x = 14,494,955,391.34
5. Step 5: Solve for x
   x = 14,494,955,391.34/139,147.31
6. Step 6: Final answer
   x = 104,169.86