Finding the Fourth Proportional to 56,107.38, 77,429.80 and 30,958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,107.38 : 77,429.80 = 30,958.50 : x
2. Step 2: Convert to fraction form
   56,107.38/77,429.80 = 30,958.50/x
3. Step 3: Cross multiply
   56,107.38x = 77,429.80 × 30,958.50
4. Step 4: Simplify right side
   56,107.38x = 2,397,109,998.75
5. Step 5: Solve for x
   x = 2,397,109,998.75/56,107.38
6. Step 6: Final answer
   x = 42,723.62