Finding the Fourth Proportional to 22,591.89, 31,169.34 and 13,635.99

Step by Step Solution

1. Step 1: Write the proportion equation
   22,591.89 : 31,169.34 = 13,635.99 : x
2. Step 2: Convert to fraction form
   22,591.89/31,169.34 = 13,635.99/x
3. Step 3: Cross multiply
   22,591.89x = 31,169.34 × 13,635.99
4. Step 4: Simplify right side
   22,591.89x = 425,024,808.55
5. Step 5: Solve for x
   x = 425,024,808.55/22,591.89
6. Step 6: Final answer
   x = 18,813.16