Finding the Fourth Proportional to 81,139.72, 111,966.42 and 45,326.92

Step by Step Solution

1. Step 1: Write the proportion equation
   81,139.72 : 111,966.42 = 45,326.92 : x
2. Step 2: Convert to fraction form
   81,139.72/111,966.42 = 45,326.92/x
3. Step 3: Cross multiply
   81,139.72x = 111,966.42 × 45,326.92
4. Step 4: Simplify right side
   81,139.72x = 5,075,092,962.03
5. Step 5: Solve for x
   x = 5,075,092,962.03/81,139.72
6. Step 6: Final answer
   x = 62,547.58