Finding the Fourth Proportional to 30,951.34, 42,748.02 and 20,862.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,951.34 : 42,748.02 = 20,862.37 : x
2. Step 2: Convert to fraction form
   30,951.34/42,748.02 = 20,862.37/x
3. Step 3: Cross multiply
   30,951.34x = 42,748.02 × 20,862.37
4. Step 4: Simplify right side
   30,951.34x = 891,825,010.01
5. Step 5: Solve for x
   x = 891,825,010.01/30,951.34
6. Step 6: Final answer
   x = 28,813.78