Finding the Fourth Proportional to 139,420.50, 192,401.46 and 75,758.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,420.50 : 192,401.46 = 75,758.30 : x
2. Step 2: Convert to fraction form
   139,420.50/192,401.46 = 75,758.30/x
3. Step 3: Cross multiply
   139,420.50x = 192,401.46 × 75,758.30
4. Step 4: Simplify right side
   139,420.50x = 14,576,007,527.12
5. Step 5: Solve for x
   x = 14,576,007,527.12/139,420.50
6. Step 6: Final answer
   x = 104,547.09