Finding the Fourth Proportional to 139,638.72, 192,702.24 and 75,976.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,638.72 : 192,702.24 = 75,976.95 : x
2. Step 2: Convert to fraction form
   139,638.72/192,702.24 = 75,976.95/x
3. Step 3: Cross multiply
   139,638.72x = 192,702.24 × 75,976.95
4. Step 4: Simplify right side
   139,638.72x = 14,640,928,453.37
5. Step 5: Solve for x
   x = 14,640,928,453.37/139,638.72
6. Step 6: Final answer
   x = 104,848.63