Finding the Fourth Proportional to 13,375.67, 18,460.71 and 7,709.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,375.67 : 18,460.71 = 7,709.40 : x
2. Step 2: Convert to fraction form
   13,375.67/18,460.71 = 7,709.40/x
3. Step 3: Cross multiply
   13,375.67x = 18,460.71 × 7,709.40
4. Step 4: Simplify right side
   13,375.67x = 142,320,997.67
5. Step 5: Solve for x
   x = 142,320,997.67/13,375.67
6. Step 6: Final answer
   x = 10,640.29