Finding the Fourth Proportional to 22,431.67, 30,731.54 and 21,590.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431.67 : 30,731.54 = 21,590.89 : x
2. Step 2: Convert to fraction form
   22,431.67/30,731.54 = 21,590.89/x
3. Step 3: Cross multiply
   22,431.67x = 30,731.54 × 21,590.89
4. Step 4: Simplify right side
   22,431.67x = 663,521,114.89
5. Step 5: Solve for x
   x = 663,521,114.89/22,431.67
6. Step 6: Final answer
   x = 29,579.66