Finding the Fourth Proportional to 22,720.51, 31,355.82 and 13,768.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,720.51 : 31,355.82 = 13,768.89 : x
2. Step 2: Convert to fraction form
   22,720.51/31,355.82 = 13,768.89/x
3. Step 3: Cross multiply
   22,720.51x = 31,355.82 × 13,768.89
4. Step 4: Simplify right side
   22,720.51x = 431,734,767.60
5. Step 5: Solve for x
   x = 431,734,767.60/22,720.51
6. Step 6: Final answer
   x = 19,001.99