Finding the Fourth Proportional to 67,720.48, 93,464.60 and 42,231

Step by Step Solution

1. Step 1: Write the proportion equation
   67,720.48 : 93,464.60 = 42,231 : x
2. Step 2: Convert to fraction form
   67,720.48/93,464.60 = 42,231/x
3. Step 3: Cross multiply
   67,720.48x = 93,464.60 × 42,231
4. Step 4: Simplify right side
   67,720.48x = 3,947,103,522.60
5. Step 5: Solve for x
   x = 3,947,103,522.60/67,720.48
6. Step 6: Final answer
   x = 58,285.23