Finding the Fourth Proportional to 11,109.71, 16,668.68 and 5,189.93

Step by Step Solution

1. Step 1: Write the proportion equation
   11,109.71 : 16,668.68 = 5,189.93 : x
2. Step 2: Convert to fraction form
   11,109.71/16,668.68 = 5,189.93/x
3. Step 3: Cross multiply
   11,109.71x = 16,668.68 × 5,189.93
4. Step 4: Simplify right side
   11,109.71x = 86,509,298.11
5. Step 5: Solve for x
   x = 86,509,298.11/11,109.71
6. Step 6: Final answer
   x = 7,786.82