Finding the Fourth Proportional to 139,236.72, 192,146.85 and 75,574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,236.72 : 192,146.85 = 75,574.50 : x
2. Step 2: Convert to fraction form
   139,236.72/192,146.85 = 75,574.50/x
3. Step 3: Cross multiply
   139,236.72x = 192,146.85 × 75,574.50
4. Step 4: Simplify right side
   139,236.72x = 14,521,402,115.33
5. Step 5: Solve for x
   x = 14,521,402,115.33/139,236.72
6. Step 6: Final answer
   x = 104,292.91