Finding the Fourth Proportional to 426,453.42, 639,743.31 and 142,051.08

Step by Step Solution

1. Step 1: Write the proportion equation
   426,453.42 : 639,743.31 = 142,051.08 : x
2. Step 2: Convert to fraction form
   426,453.42/639,743.31 = 142,051.08/x
3. Step 3: Cross multiply
   426,453.42x = 639,743.31 × 142,051.08
4. Step 4: Simplify right side
   426,453.42x = 90,876,228,108.27
5. Step 5: Solve for x
   x = 90,876,228,108.27/426,453.42
6. Step 6: Final answer
   x = 213,097.67