Finding the Fourth Proportional to 142,536.12, 213,796.56 and 53,783.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,536.12 : 213,796.56 = 53,783.88 : x
2. Step 2: Convert to fraction form
   142,536.12/213,796.56 = 53,783.88/x
3. Step 3: Cross multiply
   142,536.12x = 213,796.56 × 53,783.88
4. Step 4: Simplify right side
   142,536.12x = 11,498,808,527.45
5. Step 5: Solve for x
   x = 11,498,808,527.45/142,536.12
6. Step 6: Final answer
   x = 80,672.94