Finding the Fourth Proportional to 10,199.89, 15,298.62 and 2,805.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,199.89 : 15,298.62 = 2,805.10 : x
2. Step 2: Convert to fraction form
   10,199.89/15,298.62 = 2,805.10/x
3. Step 3: Cross multiply
   10,199.89x = 15,298.62 × 2,805.10
4. Step 4: Simplify right side
   10,199.89x = 42,914,110.20
5. Step 5: Solve for x
   x = 42,914,110.20/10,199.89
6. Step 6: Final answer
   x = 4,207.31