Finding the Fourth Proportional to 57,522.69, 86,304.79 and 20,088.30

Step by Step Solution

1. Step 1: Write the proportion equation
   57,522.69 : 86,304.79 = 20,088.30 : x
2. Step 2: Convert to fraction form
   57,522.69/86,304.79 = 20,088.30/x
3. Step 3: Cross multiply
   57,522.69x = 86,304.79 × 20,088.30
4. Step 4: Simplify right side
   57,522.69x = 1,733,716,861.71
5. Step 5: Solve for x
   x = 1,733,716,861.71/57,522.69
6. Step 6: Final answer
   x = 30,139.70