Finding the Fourth Proportional to 81,103.79, 111,907 and 45,288.29

Step by Step Solution

1. Step 1: Write the proportion equation
   81,103.79 : 111,907 = 45,288.29 : x
2. Step 2: Convert to fraction form
   81,103.79/111,907 = 45,288.29/x
3. Step 3: Cross multiply
   81,103.79x = 111,907 × 45,288.29
4. Step 4: Simplify right side
   81,103.79x = 5,068,076,669.03
5. Step 5: Solve for x
   x = 5,068,076,669.03/81,103.79
6. Step 6: Final answer
   x = 62,488.78