Finding the Fourth Proportional to 13,699.37, 18,905.15 and 7,411.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,699.37 : 18,905.15 = 7,411.74 : x
2. Step 2: Convert to fraction form
   13,699.37/18,905.15 = 7,411.74/x
3. Step 3: Cross multiply
   13,699.37x = 18,905.15 × 7,411.74
4. Step 4: Simplify right side
   13,699.37x = 140,120,019.40
5. Step 5: Solve for x
   x = 140,120,019.40/13,699.37
6. Step 6: Final answer
   x = 10,228.21