Finding the Fourth Proportional to 13,692.89, 18,896.18 and 7,405.26

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.89 : 18,896.18 = 7,405.26 : x
2. Step 2: Convert to fraction form
   13,692.89/18,896.18 = 7,405.26/x
3. Step 3: Cross multiply
   13,692.89x = 18,896.18 × 7,405.26
4. Step 4: Simplify right side
   13,692.89x = 139,931,088.88
5. Step 5: Solve for x
   x = 139,931,088.88/13,692.89
6. Step 6: Final answer
   x = 10,219.26