Finding the Fourth Proportional to 56,082.38, 77,399.15 and 30,931.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,082.38 : 77,399.15 = 30,931.88 : x
2. Step 2: Convert to fraction form
   56,082.38/77,399.15 = 30,931.88/x
3. Step 3: Cross multiply
   56,082.38x = 77,399.15 × 30,931.88
4. Step 4: Simplify right side
   56,082.38x = 2,394,100,678.25
5. Step 5: Solve for x
   x = 2,394,100,678.25/56,082.38
6. Step 6: Final answer
   x = 42,689.00