Finding the Fourth Proportional to 71,321.67, 107,004.89 and 42,891.35

Step by Step Solution

1. Step 1: Write the proportion equation
   71,321.67 : 107,004.89 = 42,891.35 : x
2. Step 2: Convert to fraction form
   71,321.67/107,004.89 = 42,891.35/x
3. Step 3: Cross multiply
   71,321.67x = 107,004.89 × 42,891.35
4. Step 4: Simplify right side
   71,321.67x = 4,589,583,760.91
5. Step 5: Solve for x
   x = 4,589,583,760.91/71,321.67
6. Step 6: Final answer
   x = 64,350.48