Finding the Fourth Proportional to 22,830.88, 31,503.72 and 13,396

Step by Step Solution

1. Step 1: Write the proportion equation
   22,830.88 : 31,503.72 = 13,396 : x
2. Step 2: Convert to fraction form
   22,830.88/31,503.72 = 13,396/x
3. Step 3: Cross multiply
   22,830.88x = 31,503.72 × 13,396
4. Step 4: Simplify right side
   22,830.88x = 422,023,833.12
5. Step 5: Solve for x
   x = 422,023,833.12/22,830.88
6. Step 6: Final answer
   x = 18,484.78