Finding the Fourth Proportional to 11,012.34, 16,516.06 and 3,991.26

Step by Step Solution

1. Step 1: Write the proportion equation
   11,012.34 : 16,516.06 = 3,991.26 : x
2. Step 2: Convert to fraction form
   11,012.34/16,516.06 = 3,991.26/x
3. Step 3: Cross multiply
   11,012.34x = 16,516.06 × 3,991.26
4. Step 4: Simplify right side
   11,012.34x = 65,919,889.64
5. Step 5: Solve for x
   x = 65,919,889.64/11,012.34
6. Step 6: Final answer
   x = 5,986.00