Finding the Fourth Proportional to 213,012, 319,337.52 and 142,676

Step by Step Solution

1. Step 1: Write the proportion equation
   213,012 : 319,337.52 = 142,676 : x
2. Step 2: Convert to fraction form
   213,012/319,337.52 = 142,676/x
3. Step 3: Cross multiply
   213,012x = 319,337.52 × 142,676
4. Step 4: Simplify right side
   213,012x = 45,561,800,003.52
5. Step 5: Solve for x
   x = 45,561,800,003.52/213,012
6. Step 6: Final answer
   x = 213,893.11