Finding the Fourth Proportional to 139,064.70, 191,907.42 and 75,401.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,064.70 : 191,907.42 = 75,401.12 : x
2. Step 2: Convert to fraction form
   139,064.70/191,907.42 = 75,401.12/x
3. Step 3: Cross multiply
   139,064.70x = 191,907.42 × 75,401.12
4. Step 4: Simplify right side
   139,064.70x = 14,470,034,404.31
5. Step 5: Solve for x
   x = 14,470,034,404.31/139,064.70
6. Step 6: Final answer
   x = 104,052.53