Finding the Fourth Proportional to 16,690.50, 23,032.71 and 9,136.74

Step by Step Solution

1. Step 1: Write the proportion equation
   16,690.50 : 23,032.71 = 9,136.74 : x
2. Step 2: Convert to fraction form
   16,690.50/23,032.71 = 9,136.74/x
3. Step 3: Cross multiply
   16,690.50x = 23,032.71 × 9,136.74
4. Step 4: Simplify right side
   16,690.50x = 210,443,882.77
5. Step 5: Solve for x
   x = 210,443,882.77/16,690.50
6. Step 6: Final answer
   x = 12,608.60