Finding the Fourth Proportional to 11,598.50, 15,990.98 and 9,471.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,598.50 : 15,990.98 = 9,471.78 : x
2. Step 2: Convert to fraction form
   11,598.50/15,990.98 = 9,471.78/x
3. Step 3: Cross multiply
   11,598.50x = 15,990.98 × 9,471.78
4. Step 4: Simplify right side
   11,598.50x = 151,463,044.54
5. Step 5: Solve for x
   x = 151,463,044.54/11,598.50
6. Step 6: Final answer
   x = 13,058.85