Finding the Fourth Proportional to 45,065.61, 67,608.12 and 13,478.18

Step by Step Solution

1. Step 1: Write the proportion equation
   45,065.61 : 67,608.12 = 13,478.18 : x
2. Step 2: Convert to fraction form
   45,065.61/67,608.12 = 13,478.18/x
3. Step 3: Cross multiply
   45,065.61x = 67,608.12 × 13,478.18
4. Step 4: Simplify right side
   45,065.61x = 911,234,072.78
5. Step 5: Solve for x
   x = 911,234,072.78/45,065.61
6. Step 6: Final answer
   x = 20,220.17