Finding the Fourth Proportional to 53,731.12, 80,056.64 and 50,713

Step by Step Solution

1. Step 1: Write the proportion equation
   53,731.12 : 80,056.64 = 50,713 : x
2. Step 2: Convert to fraction form
   53,731.12/80,056.64 = 50,713/x
3. Step 3: Cross multiply
   53,731.12x = 80,056.64 × 50,713
4. Step 4: Simplify right side
   53,731.12x = 4,059,912,384.32
5. Step 5: Solve for x
   x = 4,059,912,384.32/53,731.12
6. Step 6: Final answer
   x = 75,559.79