Finding the Fourth Proportional to 50,709.12, 69,966.72 and 30,560.64

Step by Step Solution

1. Step 1: Write the proportion equation
   50,709.12 : 69,966.72 = 30,560.64 : x
2. Step 2: Convert to fraction form
   50,709.12/69,966.72 = 30,560.64/x
3. Step 3: Cross multiply
   50,709.12x = 69,966.72 × 30,560.64
4. Step 4: Simplify right side
   50,709.12x = 2,138,227,741.90
5. Step 5: Solve for x
   x = 2,138,227,741.90/50,709.12
6. Step 6: Final answer
   x = 42,166.53