Finding the Fourth Proportional to 81,005.02, 111,786.98 and 45,195.05

Step by Step Solution

1. Step 1: Write the proportion equation
   81,005.02 : 111,786.98 = 45,195.05 : x
2. Step 2: Convert to fraction form
   81,005.02/111,786.98 = 45,195.05/x
3. Step 3: Cross multiply
   81,005.02x = 111,786.98 × 45,195.05
4. Step 4: Simplify right side
   81,005.02x = 5,052,218,150.45
5. Step 5: Solve for x
   x = 5,052,218,150.45/81,005.02
6. Step 6: Final answer
   x = 62,369.20