Finding the Fourth Proportional to 80,784, 111,490.56 and 47,278.08

Step by Step Solution

1. Step 1: Write the proportion equation
   80,784 : 111,490.56 = 47,278.08 : x
2. Step 2: Convert to fraction form
   80,784/111,490.56 = 47,278.08/x
3. Step 3: Cross multiply
   80,784x = 111,490.56 × 47,278.08
4. Step 4: Simplify right side
   80,784x = 5,271,059,614.92
5. Step 5: Solve for x
   x = 5,271,059,614.92/80,784
6. Step 6: Final answer
   x = 65,248.81