Finding the Fourth Proportional to 30,978.22, 42,750.82 and 16,831.92

Step by Step Solution

1. Step 1: Write the proportion equation
   30,978.22 : 42,750.82 = 16,831.92 : x
2. Step 2: Convert to fraction form
   30,978.22/42,750.82 = 16,831.92/x
3. Step 3: Cross multiply
   30,978.22x = 42,750.82 × 16,831.92
4. Step 4: Simplify right side
   30,978.22x = 719,578,382.17
5. Step 5: Solve for x
   x = 719,578,382.17/30,978.22
6. Step 6: Final answer
   x = 23,228.53