Finding the Fourth Proportional to 11,128.78, 16,692.90 and 3,335.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,128.78 : 16,692.90 = 3,335.50 : x
2. Step 2: Convert to fraction form
   11,128.78/16,692.90 = 3,335.50/x
3. Step 3: Cross multiply
   11,128.78x = 16,692.90 × 3,335.50
4. Step 4: Simplify right side
   11,128.78x = 55,679,167.95
5. Step 5: Solve for x
   x = 55,679,167.95/11,128.78
6. Step 6: Final answer
   x = 5,003.17