Finding the Fourth Proportional to 142,322.86, 213,514.80 and 42,490.90

Step by Step Solution

1. Step 1: Write the proportion equation
   142,322.86 : 213,514.80 = 42,490.90 : x
2. Step 2: Convert to fraction form
   142,322.86/213,514.80 = 42,490.90/x
3. Step 3: Cross multiply
   142,322.86x = 213,514.80 × 42,490.90
4. Step 4: Simplify right side
   142,322.86x = 9,072,436,015.32
5. Step 5: Solve for x
   x = 9,072,436,015.32/142,322.86
6. Step 6: Final answer
   x = 63,745.46