Finding the Fourth Proportional to 142,661.22, 213,991.32 and 42,820.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,661.22 : 213,991.32 = 42,820.98 : x
2. Step 2: Convert to fraction form
   142,661.22/213,991.32 = 42,820.98/x
3. Step 3: Cross multiply
   142,661.22x = 213,991.32 × 42,820.98
4. Step 4: Simplify right side
   142,661.22x = 9,163,317,819.79
5. Step 5: Solve for x
   x = 9,163,317,819.79/142,661.22
6. Step 6: Final answer
   x = 64,231.32