Finding the Fourth Proportional to 31,152.69, 42,996.29 and 18,578.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.69 : 42,996.29 = 18,578.25 : x
2. Step 2: Convert to fraction form
   31,152.69/42,996.29 = 18,578.25/x
3. Step 3: Cross multiply
   31,152.69x = 42,996.29 × 18,578.25
4. Step 4: Simplify right side
   31,152.69x = 798,795,824.69
5. Step 5: Solve for x
   x = 798,795,824.69/31,152.69
6. Step 6: Final answer
   x = 25,641.31