Finding the Fourth Proportional to 11,785.86, 17,668.86 and 5,117.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,785.86 : 17,668.86 = 5,117.34 : x
2. Step 2: Convert to fraction form
   11,785.86/17,668.86 = 5,117.34/x
3. Step 3: Cross multiply
   11,785.86x = 17,668.86 × 5,117.34
4. Step 4: Simplify right side
   11,785.86x = 90,417,564.03
5. Step 5: Solve for x
   x = 90,417,564.03/11,785.86
6. Step 6: Final answer
   x = 7,671.70