Finding the Fourth Proportional to 81,982.72, 122,978.47 and 25,827.22

Step by Step Solution

1. Step 1: Write the proportion equation
   81,982.72 : 122,978.47 = 25,827.22 : x
2. Step 2: Convert to fraction form
   81,982.72/122,978.47 = 25,827.22/x
3. Step 3: Cross multiply
   81,982.72x = 122,978.47 × 25,827.22
4. Step 4: Simplify right side
   81,982.72x = 3,176,191,627.94
5. Step 5: Solve for x
   x = 3,176,191,627.94/81,982.72
6. Step 6: Final answer
   x = 38,742.21