Finding the Fourth Proportional to 45,139.82, 67,718.79 and 31,106.57

Step by Step Solution

1. Step 1: Write the proportion equation
   45,139.82 : 67,718.79 = 31,106.57 : x
2. Step 2: Convert to fraction form
   45,139.82/67,718.79 = 31,106.57/x
3. Step 3: Cross multiply
   45,139.82x = 67,718.79 × 31,106.57
4. Step 4: Simplify right side
   45,139.82x = 2,106,498,942.86
5. Step 5: Solve for x
   x = 2,106,498,942.86/45,139.82
6. Step 6: Final answer
   x = 46,666.10