Finding the Fourth Proportional to 71,962.56, 99,385.79 and 54,783.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,962.56 : 99,385.79 = 54,783.54 : x
2. Step 2: Convert to fraction form
   71,962.56/99,385.79 = 54,783.54/x
3. Step 3: Cross multiply
   71,962.56x = 99,385.79 × 54,783.54
4. Step 4: Simplify right side
   71,962.56x = 5,444,705,127.98
5. Step 5: Solve for x
   x = 5,444,705,127.98/71,962.56
6. Step 6: Final answer
   x = 75,660.25