Finding the Fourth Proportional to 81,680.31, 122,537.48 and 25,518.15

Step by Step Solution

1. Step 1: Write the proportion equation
   81,680.31 : 122,537.48 = 25,518.15 : x
2. Step 2: Convert to fraction form
   81,680.31/122,537.48 = 25,518.15/x
3. Step 3: Cross multiply
   81,680.31x = 122,537.48 × 25,518.15
4. Step 4: Simplify right side
   81,680.31x = 3,126,929,667.67
5. Step 5: Solve for x
   x = 3,126,929,667.67/81,680.31
6. Step 6: Final answer
   x = 38,282.54