Finding the Fourth Proportional to 11,680.79, 17,479.31 and 10,898.73

Step by Step Solution

1. Step 1: Write the proportion equation
   11,680.79 : 17,479.31 = 10,898.73 : x
2. Step 2: Convert to fraction form
   11,680.79/17,479.31 = 10,898.73/x
3. Step 3: Cross multiply
   11,680.79x = 17,479.31 × 10,898.73
4. Step 4: Simplify right side
   11,680.79x = 190,502,225.78
5. Step 5: Solve for x
   x = 190,502,225.78/11,680.79
6. Step 6: Final answer
   x = 16,309.03