Finding the Fourth Proportional to 30,435.31, 41,966.54 and 19,666

Step by Step Solution

1. Step 1: Write the proportion equation
   30,435.31 : 41,966.54 = 19,666 : x
2. Step 2: Convert to fraction form
   30,435.31/41,966.54 = 19,666/x
3. Step 3: Cross multiply
   30,435.31x = 41,966.54 × 19,666
4. Step 4: Simplify right side
   30,435.31x = 825,313,877.31
5. Step 5: Solve for x
   x = 825,313,877.31/30,435.31
6. Step 6: Final answer
   x = 27,116.99