Finding the Fourth Proportional to 57,015.38, 78,674.41 and 31,518.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,015.38 : 78,674.41 = 31,518.31 : x
2. Step 2: Convert to fraction form
   57,015.38/78,674.41 = 31,518.31/x
3. Step 3: Cross multiply
   57,015.38x = 78,674.41 × 31,518.31
4. Step 4: Simplify right side
   57,015.38x = 2,479,684,443.45
5. Step 5: Solve for x
   x = 2,479,684,443.45/57,015.38
6. Step 6: Final answer
   x = 43,491.50