Finding the Fourth Proportional to 30,966.47, 42,737.37 and 18,391.22

Step by Step Solution

1. Step 1: Write the proportion equation
   30,966.47 : 42,737.37 = 18,391.22 : x
2. Step 2: Convert to fraction form
   30,966.47/42,737.37 = 18,391.22/x
3. Step 3: Cross multiply
   30,966.47x = 42,737.37 × 18,391.22
4. Step 4: Simplify right side
   30,966.47x = 785,992,373.89
5. Step 5: Solve for x
   x = 785,992,373.89/30,966.47
6. Step 6: Final answer
   x = 25,382.05