Finding the Fourth Proportional to 395,238.17, 592,493.98 and 142,456.80

Step by Step Solution

1. Step 1: Write the proportion equation
   395,238.17 : 592,493.98 = 142,456.80 : x
2. Step 2: Convert to fraction form
   395,238.17/592,493.98 = 142,456.80/x
3. Step 3: Cross multiply
   395,238.17x = 592,493.98 × 142,456.80
4. Step 4: Simplify right side
   395,238.17x = 84,404,796,410.06
5. Step 5: Solve for x
   x = 84,404,796,410.06/395,238.17
6. Step 6: Final answer
   x = 213,554.26