Finding the Fourth Proportional to 142,330.40, 213,288.24 and 80,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,330.40 : 213,288.24 = 80,018.72 : x
2. Step 2: Convert to fraction form
   142,330.40/213,288.24 = 80,018.72/x
3. Step 3: Cross multiply
   142,330.40x = 213,288.24 × 80,018.72
4. Step 4: Simplify right side
   142,330.40x = 17,067,051,955.85
5. Step 5: Solve for x
   x = 17,067,051,955.85/142,330.40
6. Step 6: Final answer
   x = 119,911.50