Finding the Fourth Proportional to 81,142.79, 111,979.33 and 45,336.74

Step by Step Solution

1. Step 1: Write the proportion equation
   81,142.79 : 111,979.33 = 45,336.74 : x
2. Step 2: Convert to fraction form
   81,142.79/111,979.33 = 45,336.74/x
3. Step 3: Cross multiply
   81,142.79x = 111,979.33 × 45,336.74
4. Step 4: Simplify right side
   81,142.79x = 5,076,777,096.35
5. Step 5: Solve for x
   x = 5,076,777,096.35/81,142.79
6. Step 6: Final answer
   x = 62,565.97