Finding the Fourth Proportional to 67,045.95, 100,590.78 and 31,981.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67,045.95 : 100,590.78 = 31,981.05 : x
2. Step 2: Convert to fraction form
   67,045.95/100,590.78 = 31,981.05/x
3. Step 3: Cross multiply
   67,045.95x = 100,590.78 × 31,981.05
4. Step 4: Simplify right side
   67,045.95x = 3,216,998,764.72
5. Step 5: Solve for x
   x = 3,216,998,764.72/67,045.95
6. Step 6: Final answer
   x = 47,982.00