Finding the Fourth Proportional to 16,875.12, 23,287.71 and 9,321.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,875.12 : 23,287.71 = 9,321.30 : x
2. Step 2: Convert to fraction form
   16,875.12/23,287.71 = 9,321.30/x
3. Step 3: Cross multiply
   16,875.12x = 23,287.71 × 9,321.30
4. Step 4: Simplify right side
   16,875.12x = 217,071,731.22
5. Step 5: Solve for x
   x = 217,071,731.22/16,875.12
6. Step 6: Final answer
   x = 12,863.42