Finding the Fourth Proportional to 30,740.84, 42,406.31 and 19,406.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,740.84 : 42,406.31 = 19,406.25 : x
2. Step 2: Convert to fraction form
   30,740.84/42,406.31 = 19,406.25/x
3. Step 3: Cross multiply
   30,740.84x = 42,406.31 × 19,406.25
4. Step 4: Simplify right side
   30,740.84x = 822,947,356.41
5. Step 5: Solve for x
   x = 822,947,356.41/30,740.84
6. Step 6: Final answer
   x = 26,770.49