Finding the Fourth Proportional to 16,690.30, 23,031.03 and 9,974.59

Step by Step Solution

1. Step 1: Write the proportion equation
   16,690.30 : 23,031.03 = 9,974.59 : x
2. Step 2: Convert to fraction form
   16,690.30/23,031.03 = 9,974.59/x
3. Step 3: Cross multiply
   16,690.30x = 23,031.03 × 9,974.59
4. Step 4: Simplify right side
   16,690.30x = 229,725,081.53
5. Step 5: Solve for x
   x = 229,725,081.53/16,690.30
6. Step 6: Final answer
   x = 13,763.99