Finding the Fourth Proportional to 11,688.30, 17,522.58 and 5,109.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,688.30 : 17,522.58 = 5,109.48 : x
2. Step 2: Convert to fraction form
   11,688.30/17,522.58 = 5,109.48/x
3. Step 3: Cross multiply
   11,688.30x = 17,522.58 × 5,109.48
4. Step 4: Simplify right side
   11,688.30x = 89,531,272.06
5. Step 5: Solve for x
   x = 89,531,272.06/11,688.30
6. Step 6: Final answer
   x = 7,659.91