Finding the Fourth Proportional to 139,801.82, 192,928.69 and 76,139.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,801.82 : 192,928.69 = 76,139.56 : x
2. Step 2: Convert to fraction form
   139,801.82/192,928.69 = 76,139.56/x
3. Step 3: Cross multiply
   139,801.82x = 192,928.69 × 76,139.56
4. Step 4: Simplify right side
   139,801.82x = 14,689,505,904.31
5. Step 5: Solve for x
   x = 14,689,505,904.31/139,801.82
6. Step 6: Final answer
   x = 105,073.79