Finding the Fourth Proportional to 11,665.47, 17,483.55 and 9,190.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.47 : 17,483.55 = 9,190.50 : x
2. Step 2: Convert to fraction form
   11,665.47/17,483.55 = 9,190.50/x
3. Step 3: Cross multiply
   11,665.47x = 17,483.55 × 9,190.50
4. Step 4: Simplify right side
   11,665.47x = 160,682,566.28
5. Step 5: Solve for x
   x = 160,682,566.28/11,665.47
6. Step 6: Final answer
   x = 13,774.20