Finding the Fourth Proportional to 81,729.19, 112,783.15 and 45,920.71

Step by Step Solution

1. Step 1: Write the proportion equation
   81,729.19 : 112,783.15 = 45,920.71 : x
2. Step 2: Convert to fraction form
   81,729.19/112,783.15 = 45,920.71/x
3. Step 3: Cross multiply
   81,729.19x = 112,783.15 × 45,920.71
4. Step 4: Simplify right side
   81,729.19x = 5,179,082,324.04
5. Step 5: Solve for x
   x = 5,179,082,324.04/81,729.19
6. Step 6: Final answer
   x = 63,368.82