Finding the Fourth Proportional to 30,422.29, 41,978.61 and 16,991.83

Step by Step Solution

1. Step 1: Write the proportion equation
   30,422.29 : 41,978.61 = 16,991.83 : x
2. Step 2: Convert to fraction form
   30,422.29/41,978.61 = 16,991.83/x
3. Step 3: Cross multiply
   30,422.29x = 41,978.61 × 16,991.83
4. Step 4: Simplify right side
   30,422.29x = 713,293,404.76
5. Step 5: Solve for x
   x = 713,293,404.76/30,422.29
6. Step 6: Final answer
   x = 23,446.41