Finding the Fourth Proportional to 47,906.89, 71,856.99 and 17,915.42

Step by Step Solution

1. Step 1: Write the proportion equation
   47,906.89 : 71,856.99 = 17,915.42 : x
2. Step 2: Convert to fraction form
   47,906.89/71,856.99 = 17,915.42/x
3. Step 3: Cross multiply
   47,906.89x = 71,856.99 × 17,915.42
4. Step 4: Simplify right side
   47,906.89x = 1,287,348,155.79
5. Step 5: Solve for x
   x = 1,287,348,155.79/47,906.89
6. Step 6: Final answer
   x = 26,871.88