Finding the Fourth Proportional to 139,238.72, 192,149.61 and 75,576.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,238.72 : 192,149.61 = 75,576.50 : x
2. Step 2: Convert to fraction form
   139,238.72/192,149.61 = 75,576.50/x
3. Step 3: Cross multiply
   139,238.72x = 192,149.61 × 75,576.50
4. Step 4: Simplify right side
   139,238.72x = 14,521,995,000.17
5. Step 5: Solve for x
   x = 14,521,995,000.17/139,238.72
6. Step 6: Final answer
   x = 104,295.67