Finding the Fourth Proportional to 13,018.38, 19,523.78 and 7,470.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.38 : 19,523.78 = 7,470.78 : x
2. Step 2: Convert to fraction form
   13,018.38/19,523.78 = 7,470.78/x
3. Step 3: Cross multiply
   13,018.38x = 19,523.78 × 7,470.78
4. Step 4: Simplify right side
   13,018.38x = 145,857,865.15
5. Step 5: Solve for x
   x = 145,857,865.15/13,018.38
6. Step 6: Final answer
   x = 11,204.00