Finding the Fourth Proportional to 30,674.16, 42,348.42 and 28,902.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,674.16 : 42,348.42 = 28,902.69 : x
2. Step 2: Convert to fraction form
   30,674.16/42,348.42 = 28,902.69/x
3. Step 3: Cross multiply
   30,674.16x = 42,348.42 × 28,902.69
4. Step 4: Simplify right side
   30,674.16x = 1,223,983,255.25
5. Step 5: Solve for x
   x = 1,223,983,255.25/30,674.16
6. Step 6: Final answer
   x = 39,902.75