Finding the Fourth Proportional to 139,896.81, 193,057.61 and 76,234.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,896.81 : 193,057.61 = 76,234.59 : x
2. Step 2: Convert to fraction form
   139,896.81/193,057.61 = 76,234.59/x
3. Step 3: Cross multiply
   139,896.81x = 193,057.61 × 76,234.59
4. Step 4: Simplify right side
   139,896.81x = 14,717,667,363.56
5. Step 5: Solve for x
   x = 14,717,667,363.56/139,896.81
6. Step 6: Final answer
   x = 105,203.74