Finding the Fourth Proportional to 11,070.10, 16,609.20 and 5,222.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,070.10 : 16,609.20 = 5,222.31 : x
2. Step 2: Convert to fraction form
   11,070.10/16,609.20 = 5,222.31/x
3. Step 3: Cross multiply
   11,070.10x = 16,609.20 × 5,222.31
4. Step 4: Simplify right side
   11,070.10x = 86,738,391.25
5. Step 5: Solve for x
   x = 86,738,391.25/11,070.10
6. Step 6: Final answer
   x = 7,835.38