Finding the Fourth Proportional to 48,920.46, 67,488.49 and 31,920.78

Step by Step Solution

1. Step 1: Write the proportion equation
   48,920.46 : 67,488.49 = 31,920.78 : x
2. Step 2: Convert to fraction form
   48,920.46/67,488.49 = 31,920.78/x
3. Step 3: Cross multiply
   48,920.46x = 67,488.49 × 31,920.78
4. Step 4: Simplify right side
   48,920.46x = 2,154,285,534.81
5. Step 5: Solve for x
   x = 2,154,285,534.81/48,920.46
6. Step 6: Final answer
   x = 44,036.50