Finding the Fourth Proportional to 81,139.12, 111,958.30 and 45,329.42

Step by Step Solution

1. Step 1: Write the proportion equation
   81,139.12 : 111,958.30 = 45,329.42 : x
2. Step 2: Convert to fraction form
   81,139.12/111,958.30 = 45,329.42/x
3. Step 3: Cross multiply
   81,139.12x = 111,958.30 × 45,329.42
4. Step 4: Simplify right side
   81,139.12x = 5,075,005,139.74
5. Step 5: Solve for x
   x = 5,075,005,139.74/81,139.12
6. Step 6: Final answer
   x = 62,546.96