Finding the Fourth Proportional to 81,139.36, 111,972.31 and 45,329.38

Step by Step Solution

1. Step 1: Write the proportion equation
   81,139.36 : 111,972.31 = 45,329.38 : x
2. Step 2: Convert to fraction form
   81,139.36/111,972.31 = 45,329.38/x
3. Step 3: Cross multiply
   81,139.36x = 111,972.31 × 45,329.38
4. Step 4: Simplify right side
   81,139.36x = 5,075,635,389.47
5. Step 5: Solve for x
   x = 5,075,635,389.47/81,139.36
6. Step 6: Final answer
   x = 62,554.54