Finding the Fourth Proportional to 139,721.72, 192,816 and 76,060

Step by Step Solution

1. Step 1: Write the proportion equation
   139,721.72 : 192,816 = 76,060 : x
2. Step 2: Convert to fraction form
   139,721.72/192,816 = 76,060/x
3. Step 3: Cross multiply
   139,721.72x = 192,816 × 76,060
4. Step 4: Simplify right side
   139,721.72x = 14,665,584,960
5. Step 5: Solve for x
   x = 14,665,584,960/139,721.72
6. Step 6: Final answer
   x = 104,962.81