Finding the Fourth Proportional to 13,697.50, 18,902.54 and 7,409.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,697.50 : 18,902.54 = 7,409.87 : x
2. Step 2: Convert to fraction form
   13,697.50/18,902.54 = 7,409.87/x
3. Step 3: Cross multiply
   13,697.50x = 18,902.54 × 7,409.87
4. Step 4: Simplify right side
   13,697.50x = 140,065,327.02
5. Step 5: Solve for x
   x = 140,065,327.02/13,697.50
6. Step 6: Final answer
   x = 10,225.62