Finding the Fourth Proportional to 67,225.86, 100,838.82 and 20,478.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,225.86 : 100,838.82 = 20,478.78 : x
2. Step 2: Convert to fraction form
   67,225.86/100,838.82 = 20,478.78/x
3. Step 3: Cross multiply
   67,225.86x = 100,838.82 × 20,478.78
4. Step 4: Simplify right side
   67,225.86x = 2,065,056,010.24
5. Step 5: Solve for x
   x = 2,065,056,010.24/67,225.86
6. Step 6: Final answer
   x = 30,718.18