Finding the Fourth Proportional to 16,680.21, 23,019.57 and 9,510.36

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.21 : 23,019.57 = 9,510.36 : x
2. Step 2: Convert to fraction form
   16,680.21/23,019.57 = 9,510.36/x
3. Step 3: Cross multiply
   16,680.21x = 23,019.57 × 9,510.36
4. Step 4: Simplify right side
   16,680.21x = 218,924,397.75
5. Step 5: Solve for x
   x = 218,924,397.75/16,680.21
6. Step 6: Final answer
   x = 13,124.80