Finding the Fourth Proportional to 30,428.76, 41,990.17 and 16,997.34

Step by Step Solution

1. Step 1: Write the proportion equation
   30,428.76 : 41,990.17 = 16,997.34 : x
2. Step 2: Convert to fraction form
   30,428.76/41,990.17 = 16,997.34/x
3. Step 3: Cross multiply
   30,428.76x = 41,990.17 × 16,997.34
4. Step 4: Simplify right side
   30,428.76x = 713,721,196.15
5. Step 5: Solve for x
   x = 713,721,196.15/30,428.76
6. Step 6: Final answer
   x = 23,455.48