Finding the Fourth Proportional to 50,561.28, 69,742.08 and 30,689.28

Step by Step Solution

1. Step 1: Write the proportion equation
   50,561.28 : 69,742.08 = 30,689.28 : x
2. Step 2: Convert to fraction form
   50,561.28/69,742.08 = 30,689.28/x
3. Step 3: Cross multiply
   50,561.28x = 69,742.08 × 30,689.28
4. Step 4: Simplify right side
   50,561.28x = 2,140,334,220.90
5. Step 5: Solve for x
   x = 2,140,334,220.90/50,561.28
6. Step 6: Final answer
   x = 42,331.49