Finding the Fourth Proportional to 142,404.70, 213,607.05 and 142,404.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,404.70 : 213,607.05 = 142,404.70 : x
2. Step 2: Convert to fraction form
   142,404.70/213,607.05 = 142,404.70/x
3. Step 3: Cross multiply
   142,404.70x = 213,607.05 × 142,404.70
4. Step 4: Simplify right side
   142,404.70x = 30,418,647,873.14
5. Step 5: Solve for x
   x = 30,418,647,873.14/142,404.70
6. Step 6: Final answer
   x = 213,607.05