Finding the Fourth Proportional to 13,692.61, 18,895.81 and 7,404.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.61 : 18,895.81 = 7,404.98 : x
2. Step 2: Convert to fraction form
   13,692.61/18,895.81 = 7,404.98/x
3. Step 3: Cross multiply
   13,692.61x = 18,895.81 × 7,404.98
4. Step 4: Simplify right side
   13,692.61x = 139,923,095.13
5. Step 5: Solve for x
   x = 139,923,095.13/13,692.61
6. Step 6: Final answer
   x = 10,218.88