Finding the Fourth Proportional to 13,697.42, 18,902.42 and 7,409.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,697.42 : 18,902.42 = 7,409.80 : x
2. Step 2: Convert to fraction form
   13,697.42/18,902.42 = 7,409.80/x
3. Step 3: Cross multiply
   13,697.42x = 18,902.42 × 7,409.80
4. Step 4: Simplify right side
   13,697.42x = 140,063,151.72
5. Step 5: Solve for x
   x = 140,063,151.72/13,697.42
6. Step 6: Final answer
   x = 10,225.51