Finding the Fourth Proportional to 81,392.14, 122,117.57 and 43,401.45

Step by Step Solution

1. Step 1: Write the proportion equation
   81,392.14 : 122,117.57 = 43,401.45 : x
2. Step 2: Convert to fraction form
   81,392.14/122,117.57 = 43,401.45/x
3. Step 3: Cross multiply
   81,392.14x = 122,117.57 × 43,401.45
4. Step 4: Simplify right side
   81,392.14x = 5,300,079,608.48
5. Step 5: Solve for x
   x = 5,300,079,608.48/81,392.14
6. Step 6: Final answer
   x = 65,117.83