Finding the Fourth Proportional to 30,860.39, 42,594.53 and 21,910.70

Step by Step Solution

1. Step 1: Write the proportion equation
   30,860.39 : 42,594.53 = 21,910.70 : x
2. Step 2: Convert to fraction form
   30,860.39/42,594.53 = 21,910.70/x
3. Step 3: Cross multiply
   30,860.39x = 42,594.53 × 21,910.70
4. Step 4: Simplify right side
   30,860.39x = 933,275,965.40
5. Step 5: Solve for x
   x = 933,275,965.40/30,860.39
6. Step 6: Final answer
   x = 30,241.87