Finding the Fourth Proportional to 30,738.11, 42,367.61 and 21,774.11

Step by Step Solution

1. Step 1: Write the proportion equation
   30,738.11 : 42,367.61 = 21,774.11 : x
2. Step 2: Convert to fraction form
   30,738.11/42,367.61 = 21,774.11/x
3. Step 3: Cross multiply
   30,738.11x = 42,367.61 × 21,774.11
4. Step 4: Simplify right side
   30,738.11x = 922,516,891.71
5. Step 5: Solve for x
   x = 922,516,891.71/30,738.11
6. Step 6: Final answer
   x = 30,012.15