Finding the Fourth Proportional to 20,870.84, 31,296.04 and 10,328.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,870.84 : 31,296.04 = 10,328.69 : x
2. Step 2: Convert to fraction form
   20,870.84/31,296.04 = 10,328.69/x
3. Step 3: Cross multiply
   20,870.84x = 31,296.04 × 10,328.69
4. Step 4: Simplify right side
   20,870.84x = 323,247,095.39
5. Step 5: Solve for x
   x = 323,247,095.39/20,870.84
6. Step 6: Final answer
   x = 15,487.98