Finding the Fourth Proportional to 22,738.89, 31,152.42 and 21,886.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,738.89 : 31,152.42 = 21,886.64 : x
2. Step 2: Convert to fraction form
   22,738.89/31,152.42 = 21,886.64/x
3. Step 3: Cross multiply
   22,738.89x = 31,152.42 × 21,886.64
4. Step 4: Simplify right side
   22,738.89x = 681,821,801.67
5. Step 5: Solve for x
   x = 681,821,801.67/22,738.89
6. Step 6: Final answer
   x = 29,984.83