Finding the Fourth Proportional to 82,278.85, 123,369.68 and 42,912.85

Step by Step Solution

1. Step 1: Write the proportion equation
   82,278.85 : 123,369.68 = 42,912.85 : x
2. Step 2: Convert to fraction form
   82,278.85/123,369.68 = 42,912.85/x
3. Step 3: Cross multiply
   82,278.85x = 123,369.68 × 42,912.85
4. Step 4: Simplify right side
   82,278.85x = 5,294,144,357.82
5. Step 5: Solve for x
   x = 5,294,144,357.82/82,278.85
6. Step 6: Final answer
   x = 64,343.93