Finding the Fourth Proportional to 57,019, 78,687.90 and 31,868.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57,019 : 78,687.90 = 31,868.56 : x
2. Step 2: Convert to fraction form
   57,019/78,687.90 = 31,868.56/x
3. Step 3: Cross multiply
   57,019x = 78,687.90 × 31,868.56
4. Step 4: Simplify right side
   57,019x = 2,507,670,062.42
5. Step 5: Solve for x
   x = 2,507,670,062.42/57,019
6. Step 6: Final answer
   x = 43,979.55