Finding the Fourth Proportional to 31,153.34, 42,984.66 and 18,397.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153.34 : 42,984.66 = 18,397.82 : x
2. Step 2: Convert to fraction form
   31,153.34/42,984.66 = 18,397.82/x
3. Step 3: Cross multiply
   31,153.34x = 42,984.66 × 18,397.82
4. Step 4: Simplify right side
   31,153.34x = 790,823,868.62
5. Step 5: Solve for x
   x = 790,823,868.62/31,153.34
6. Step 6: Final answer
   x = 25,384.88