Finding the Fourth Proportional to 47,978.85, 71,897.20 and 19,481.15

Step by Step Solution

1. Step 1: Write the proportion equation
   47,978.85 : 71,897.20 = 19,481.15 : x
2. Step 2: Convert to fraction form
   47,978.85/71,897.20 = 19,481.15/x
3. Step 3: Cross multiply
   47,978.85x = 71,897.20 × 19,481.15
4. Step 4: Simplify right side
   47,978.85x = 1,400,640,137.78
5. Step 5: Solve for x
   x = 1,400,640,137.78/47,978.85
6. Step 6: Final answer
   x = 29,192.87