Finding the Fourth Proportional to 57,522.68, 86,309.12 and 20,109.59

Step by Step Solution

1. Step 1: Write the proportion equation
   57,522.68 : 86,309.12 = 20,109.59 : x
2. Step 2: Convert to fraction form
   57,522.68/86,309.12 = 20,109.59/x
3. Step 3: Cross multiply
   57,522.68x = 86,309.12 × 20,109.59
4. Step 4: Simplify right side
   57,522.68x = 1,735,641,016.46
5. Step 5: Solve for x
   x = 1,735,641,016.46/57,522.68
6. Step 6: Final answer
   x = 30,173.16