Finding the Fourth Proportional to 142,285.86, 213,459.30 and 42,453.90

Step by Step Solution

1. Step 1: Write the proportion equation
   142,285.86 : 213,459.30 = 42,453.90 : x
2. Step 2: Convert to fraction form
   142,285.86/213,459.30 = 42,453.90/x
3. Step 3: Cross multiply
   142,285.86x = 213,459.30 × 42,453.90
4. Step 4: Simplify right side
   142,285.86x = 9,062,179,776.27
5. Step 5: Solve for x
   x = 9,062,179,776.27/142,285.86
6. Step 6: Final answer
   x = 63,689.95