Finding the Fourth Proportional to 142,647.67, 213,940.52 and 42,781.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,647.67 : 213,940.52 = 42,781.05 : x
2. Step 2: Convert to fraction form
   142,647.67/213,940.52 = 42,781.05/x
3. Step 3: Cross multiply
   142,647.67x = 213,940.52 × 42,781.05
4. Step 4: Simplify right side
   142,647.67x = 9,152,600,083.15
5. Step 5: Solve for x
   x = 9,152,600,083.15/142,647.67
6. Step 6: Final answer
   x = 64,162.28