Finding the Fourth Proportional to 47,820.48, 71,734.72 and 12,760

Step by Step Solution

1. Step 1: Write the proportion equation
   47,820.48 : 71,734.72 = 12,760 : x
2. Step 2: Convert to fraction form
   47,820.48/71,734.72 = 12,760/x
3. Step 3: Cross multiply
   47,820.48x = 71,734.72 × 12,760
4. Step 4: Simplify right side
   47,820.48x = 915,335,027.20
5. Step 5: Solve for x
   x = 915,335,027.20/47,820.48
6. Step 6: Final answer
   x = 19,141.07