Finding the Fourth Proportional to 142,662.52, 213,810.66 and 53,810.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,662.52 : 213,810.66 = 53,810.20 : x
2. Step 2: Convert to fraction form
   142,662.52/213,810.66 = 53,810.20/x
3. Step 3: Cross multiply
   142,662.52x = 213,810.66 × 53,810.20
4. Step 4: Simplify right side
   142,662.52x = 11,505,194,376.73
5. Step 5: Solve for x
   x = 11,505,194,376.73/142,662.52
6. Step 6: Final answer
   x = 80,646.23