Finding the Fourth Proportional to 13,383.78, 18,470.61 and 7,416

Step by Step Solution

1. Step 1: Write the proportion equation
   13,383.78 : 18,470.61 = 7,416 : x
2. Step 2: Convert to fraction form
   13,383.78/18,470.61 = 7,416/x
3. Step 3: Cross multiply
   13,383.78x = 18,470.61 × 7,416
4. Step 4: Simplify right side
   13,383.78x = 136,978,043.76
5. Step 5: Solve for x
   x = 136,978,043.76/13,383.78
6. Step 6: Final answer
   x = 10,234.63