Finding the Fourth Proportional to 426,533.82, 639,735.12 and 142,229.31

Step by Step Solution

1. Step 1: Write the proportion equation
   426,533.82 : 639,735.12 = 142,229.31 : x
2. Step 2: Convert to fraction form
   426,533.82/639,735.12 = 142,229.31/x
3. Step 3: Cross multiply
   426,533.82x = 639,735.12 × 142,229.31
4. Step 4: Simplify right side
   426,533.82x = 90,989,084,700.37
5. Step 5: Solve for x
   x = 90,989,084,700.37/426,533.82
6. Step 6: Final answer
   x = 213,322.09