Finding the Fourth Proportional to 11,686.23, 17,528.76 and 4,290.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,686.23 : 17,528.76 = 4,290.10 : x
2. Step 2: Convert to fraction form
   11,686.23/17,528.76 = 4,290.10/x
3. Step 3: Cross multiply
   11,686.23x = 17,528.76 × 4,290.10
4. Step 4: Simplify right side
   11,686.23x = 75,200,133.28
5. Step 5: Solve for x
   x = 75,200,133.28/11,686.23
6. Step 6: Final answer
   x = 6,434.94