Finding the Fourth Proportional to 30,622.78, 42,264.06 and 18,693.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,622.78 : 42,264.06 = 18,693.06 : x
2. Step 2: Convert to fraction form
   30,622.78/42,264.06 = 18,693.06/x
3. Step 3: Cross multiply
   30,622.78x = 42,264.06 × 18,693.06
4. Step 4: Simplify right side
   30,622.78x = 790,044,609.42
5. Step 5: Solve for x
   x = 790,044,609.42/30,622.78
6. Step 6: Final answer
   x = 25,799.25