Finding the Fourth Proportional to 10,200.89, 15,300.12 and 2,806.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,200.89 : 15,300.12 = 2,806.10 : x
2. Step 2: Convert to fraction form
   10,200.89/15,300.12 = 2,806.10/x
3. Step 3: Cross multiply
   10,200.89x = 15,300.12 × 2,806.10
4. Step 4: Simplify right side
   10,200.89x = 42,933,666.73
5. Step 5: Solve for x
   x = 42,933,666.73/10,200.89
6. Step 6: Final answer
   x = 4,208.82