Finding the Fourth Proportional to 67,764.20, 101,507.78 and 31,689.02

Step by Step Solution

1. Step 1: Write the proportion equation
   67,764.20 : 101,507.78 = 31,689.02 : x
2. Step 2: Convert to fraction form
   67,764.20/101,507.78 = 31,689.02/x
3. Step 3: Cross multiply
   67,764.20x = 101,507.78 × 31,689.02
4. Step 4: Simplify right side
   67,764.20x = 3,216,682,403.57
5. Step 5: Solve for x
   x = 3,216,682,403.57/67,764.20
6. Step 6: Final answer
   x = 47,468.76