Finding the Fourth Proportional to 13,697.12, 18,902.06 and 7,409.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,697.12 : 18,902.06 = 7,409.56 : x
2. Step 2: Convert to fraction form
   13,697.12/18,902.06 = 7,409.56/x
3. Step 3: Cross multiply
   13,697.12x = 18,902.06 × 7,409.56
4. Step 4: Simplify right side
   13,697.12x = 140,055,947.69
5. Step 5: Solve for x
   x = 140,055,947.69/13,697.12
6. Step 6: Final answer
   x = 10,225.21