Finding the Fourth Proportional to 81,090.42, 111,903.72 and 45,281.04

Step by Step Solution

1. Step 1: Write the proportion equation
   81,090.42 : 111,903.72 = 45,281.04 : x
2. Step 2: Convert to fraction form
   81,090.42/111,903.72 = 45,281.04/x
3. Step 3: Cross multiply
   81,090.42x = 111,903.72 × 45,281.04
4. Step 4: Simplify right side
   81,090.42x = 5,067,116,821.47
5. Step 5: Solve for x
   x = 5,067,116,821.47/81,090.42
6. Step 6: Final answer
   x = 62,487.24