Finding the Fourth Proportional to 81,155.01, 111,991.81 and 45,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,155.01 : 111,991.81 = 45,345.31 : x
2. Step 2: Convert to fraction form
   81,155.01/111,991.81 = 45,345.31/x
3. Step 3: Cross multiply
   81,155.01x = 111,991.81 × 45,345.31
4. Step 4: Simplify right side
   81,155.01x = 5,078,303,341.91
5. Step 5: Solve for x
   x = 5,078,303,341.91/81,155.01
6. Step 6: Final answer
   x = 62,575.35