Finding the Fourth Proportional to 81,141.72, 111,969.18 and 45,328.92

Step by Step Solution

1. Step 1: Write the proportion equation
   81,141.72 : 111,969.18 = 45,328.92 : x
2. Step 2: Convert to fraction form
   81,141.72/111,969.18 = 45,328.92/x
3. Step 3: Cross multiply
   81,141.72x = 111,969.18 × 45,328.92
4. Step 4: Simplify right side
   81,141.72x = 5,075,442,002.69
5. Step 5: Solve for x
   x = 5,075,442,002.69/81,141.72
6. Step 6: Final answer
   x = 62,550.34