Finding the Fourth Proportional to 142,210.10, 213,276.27 and 53,456.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,210.10 : 213,276.27 = 53,456.78 : x
2. Step 2: Convert to fraction form
   142,210.10/213,276.27 = 53,456.78/x
3. Step 3: Cross multiply
   142,210.10x = 213,276.27 × 53,456.78
4. Step 4: Simplify right side
   142,210.10x = 11,401,062,644.61
5. Step 5: Solve for x
   x = 11,401,062,644.61/142,210.10
6. Step 6: Final answer
   x = 80,170.56