Finding the Fourth Proportional to 16,870.76, 23,281.37 and 9,317.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,870.76 : 23,281.37 = 9,317.10 : x
2. Step 2: Convert to fraction form
   16,870.76/23,281.37 = 9,317.10/x
3. Step 3: Cross multiply
   16,870.76x = 23,281.37 × 9,317.10
4. Step 4: Simplify right side
   16,870.76x = 216,914,915.02
5. Step 5: Solve for x
   x = 216,914,915.02/16,870.76
6. Step 6: Final answer
   x = 12,857.45