Finding the Fourth Proportional to 22,911.59, 31,620 and 13,350.98

Step by Step Solution

1. Step 1: Write the proportion equation
   22,911.59 : 31,620 = 13,350.98 : x
2. Step 2: Convert to fraction form
   22,911.59/31,620 = 13,350.98/x
3. Step 3: Cross multiply
   22,911.59x = 31,620 × 13,350.98
4. Step 4: Simplify right side
   22,911.59x = 422,157,987.60
5. Step 5: Solve for x
   x = 422,157,987.60/22,911.59
6. Step 6: Final answer
   x = 18,425.52