Finding the Fourth Proportional to 426,404.88, 639,393.24 and 141,995.25

Step by Step Solution

1. Step 1: Write the proportion equation
   426,404.88 : 639,393.24 = 141,995.25 : x
2. Step 2: Convert to fraction form
   426,404.88/639,393.24 = 141,995.25/x
3. Step 3: Cross multiply
   426,404.88x = 639,393.24 × 141,995.25
4. Step 4: Simplify right side
   426,404.88x = 90,790,802,962.11
5. Step 5: Solve for x
   x = 90,790,802,962.11/426,404.88
6. Step 6: Final answer
   x = 212,921.59