Finding the Fourth Proportional to 22,011.81, 30,385.76 and 13,515.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,011.81 : 30,385.76 = 13,515.31 : x
2. Step 2: Convert to fraction form
   22,011.81/30,385.76 = 13,515.31/x
3. Step 3: Cross multiply
   22,011.81x = 30,385.76 × 13,515.31
4. Step 4: Simplify right side
   22,011.81x = 410,672,965.99
5. Step 5: Solve for x
   x = 410,672,965.99/22,011.81
6. Step 6: Final answer
   x = 18,656.94