Finding the Fourth Proportional to 11,000.78, 16,499.60 and 3,605.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,000.78 : 16,499.60 = 3,605.54 : x
2. Step 2: Convert to fraction form
   11,000.78/16,499.60 = 3,605.54/x
3. Step 3: Cross multiply
   11,000.78x = 16,499.60 × 3,605.54
4. Step 4: Simplify right side
   11,000.78x = 59,489,967.78
5. Step 5: Solve for x
   x = 59,489,967.78/11,000.78
6. Step 6: Final answer
   x = 5,407.80