Finding the Fourth Proportional to 16,680.32, 23,015.64 and 9,510.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.32 : 23,015.64 = 9,510.10 : x
2. Step 2: Convert to fraction form
   16,680.32/23,015.64 = 9,510.10/x
3. Step 3: Cross multiply
   16,680.32x = 23,015.64 × 9,510.10
4. Step 4: Simplify right side
   16,680.32x = 218,881,037.96
5. Step 5: Solve for x
   x = 218,881,037.96/16,680.32
6. Step 6: Final answer
   x = 13,122.11