Finding the Fourth Proportional to 57,673.80, 86,423.04 and 42,813

Step by Step Solution

1. Step 1: Write the proportion equation
   57,673.80 : 86,423.04 = 42,813 : x
2. Step 2: Convert to fraction form
   57,673.80/86,423.04 = 42,813/x
3. Step 3: Cross multiply
   57,673.80x = 86,423.04 × 42,813
4. Step 4: Simplify right side
   57,673.80x = 3,700,029,611.52
5. Step 5: Solve for x
   x = 3,700,029,611.52/57,673.80
6. Step 6: Final answer
   x = 64,154.43