Finding the Fourth Proportional to 54,211.86, 81,170.16 and 42,162.18

Step by Step Solution

1. Step 1: Write the proportion equation
   54,211.86 : 81,170.16 = 42,162.18 : x
2. Step 2: Convert to fraction form
   54,211.86/81,170.16 = 42,162.18/x
3. Step 3: Cross multiply
   54,211.86x = 81,170.16 × 42,162.18
4. Step 4: Simplify right side
   54,211.86x = 3,422,310,896.55
5. Step 5: Solve for x
   x = 3,422,310,896.55/54,211.86
6. Step 6: Final answer
   x = 63,128.45