Finding the Fourth Proportional to 139,871.38, 193,020.04 and 76,209.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,871.38 : 193,020.04 = 76,209.62 : x
2. Step 2: Convert to fraction form
   139,871.38/193,020.04 = 76,209.62/x
3. Step 3: Cross multiply
   139,871.38x = 193,020.04 × 76,209.62
4. Step 4: Simplify right side
   139,871.38x = 14,709,983,900.78
5. Step 5: Solve for x
   x = 14,709,983,900.78/139,871.38
6. Step 6: Final answer
   x = 105,167.93