Finding the Fourth Proportional to 13,692.42, 18,895.53 and 7,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.42 : 18,895.53 = 7,404.80 : x
2. Step 2: Convert to fraction form
   13,692.42/18,895.53 = 7,404.80/x
3. Step 3: Cross multiply
   13,692.42x = 18,895.53 × 7,404.80
4. Step 4: Simplify right side
   13,692.42x = 139,917,526.07
5. Step 5: Solve for x
   x = 139,917,526.07/13,692.42
6. Step 6: Final answer
   x = 10,218.61