Finding the Fourth Proportional to 60,403.69, 90,621.87 and 42,984.10

Step by Step Solution

1. Step 1: Write the proportion equation
   60,403.69 : 90,621.87 = 42,984.10 : x
2. Step 2: Convert to fraction form
   60,403.69/90,621.87 = 42,984.10/x
3. Step 3: Cross multiply
   60,403.69x = 90,621.87 × 42,984.10
4. Step 4: Simplify right side
   60,403.69x = 3,895,299,522.27
5. Step 5: Solve for x
   x = 3,895,299,522.27/60,403.69
6. Step 6: Final answer
   x = 64,487.77