Finding the Fourth Proportional to 81,025.84, 111,815.49 and 45,213.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,025.84 : 111,815.49 = 45,213.72 : x
2. Step 2: Convert to fraction form
   81,025.84/111,815.49 = 45,213.72/x
3. Step 3: Cross multiply
   81,025.84x = 111,815.49 × 45,213.72
4. Step 4: Simplify right side
   81,025.84x = 5,055,593,697.45
5. Step 5: Solve for x
   x = 5,055,593,697.45/81,025.84
6. Step 6: Final answer
   x = 62,394.83