Finding the Fourth Proportional to 13,692.96, 18,896.24 and 7,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.96 : 18,896.24 = 7,405.34 : x
2. Step 2: Convert to fraction form
   13,692.96/18,896.24 = 7,405.34/x
3. Step 3: Cross multiply
   13,692.96x = 18,896.24 × 7,405.34
4. Step 4: Simplify right side
   13,692.96x = 139,933,005.95
5. Step 5: Solve for x
   x = 139,933,005.95/13,692.96
6. Step 6: Final answer
   x = 10,219.34