Finding the Fourth Proportional to 57,074.36, 78,758.34 and 31,919

Step by Step Solution

1. Step 1: Write the proportion equation
   57,074.36 : 78,758.34 = 31,919 : x
2. Step 2: Convert to fraction form
   57,074.36/78,758.34 = 31,919/x
3. Step 3: Cross multiply
   57,074.36x = 78,758.34 × 31,919
4. Step 4: Simplify right side
   57,074.36x = 2,513,887,454.46
5. Step 5: Solve for x
   x = 2,513,887,454.46/57,074.36
6. Step 6: Final answer
   x = 44,045.83