Finding the Fourth Proportional to 426,537.82, 639,741.12 and 142,233.31

Step by Step Solution

1. Step 1: Write the proportion equation
   426,537.82 : 639,741.12 = 142,233.31 : x
2. Step 2: Convert to fraction form
   426,537.82/639,741.12 = 142,233.31/x
3. Step 3: Cross multiply
   426,537.82x = 639,741.12 × 142,233.31
4. Step 4: Simplify right side
   426,537.82x = 90,992,497,040.71
5. Step 5: Solve for x
   x = 90,992,497,040.71/426,537.82
6. Step 6: Final answer
   x = 213,328.09