Finding the Fourth Proportional to 30,964.47, 42,734.61 and 18,389.22

Step by Step Solution

1. Step 1: Write the proportion equation
   30,964.47 : 42,734.61 = 18,389.22 : x
2. Step 2: Convert to fraction form
   30,964.47/42,734.61 = 18,389.22/x
3. Step 3: Cross multiply
   30,964.47x = 42,734.61 × 18,389.22
4. Step 4: Simplify right side
   30,964.47x = 785,856,144.90
5. Step 5: Solve for x
   x = 785,856,144.90/30,964.47
6. Step 6: Final answer
   x = 25,379.29