Finding the Fourth Proportional to 16,428.78, 22,670.46 and 9,353.79

Step by Step Solution

1. Step 1: Write the proportion equation
   16,428.78 : 22,670.46 = 9,353.79 : x
2. Step 2: Convert to fraction form
   16,428.78/22,670.46 = 9,353.79/x
3. Step 3: Cross multiply
   16,428.78x = 22,670.46 × 9,353.79
4. Step 4: Simplify right side
   16,428.78x = 212,054,722.04
5. Step 5: Solve for x
   x = 212,054,722.04/16,428.78
6. Step 6: Final answer
   x = 12,907.51