Finding the Fourth Proportional to 22,570.38, 31,152.33 and 21,515.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,570.38 : 31,152.33 = 21,515.76 : x
2. Step 2: Convert to fraction form
   22,570.38/31,152.33 = 21,515.76/x
3. Step 3: Cross multiply
   22,570.38x = 31,152.33 × 21,515.76
4. Step 4: Simplify right side
   22,570.38x = 670,266,055.72
5. Step 5: Solve for x
   x = 670,266,055.72/22,570.38
6. Step 6: Final answer
   x = 29,696.71