Finding the Fourth Proportional to 13,697.39, 18,902.38 and 7,409.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,697.39 : 18,902.38 = 7,409.75 : x
2. Step 2: Convert to fraction form
   13,697.39/18,902.38 = 7,409.75/x
3. Step 3: Cross multiply
   13,697.39x = 18,902.38 × 7,409.75
4. Step 4: Simplify right side
   13,697.39x = 140,061,797.17
5. Step 5: Solve for x
   x = 140,061,797.17/13,697.39
6. Step 6: Final answer
   x = 10,225.44