Finding the Fourth Proportional to 10,661.22, 15,992.64 and 2,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,661.22 : 15,992.64 = 2,870.10 : x
2. Step 2: Convert to fraction form
   10,661.22/15,992.64 = 2,870.10/x
3. Step 3: Cross multiply
   10,661.22x = 15,992.64 × 2,870.10
4. Step 4: Simplify right side
   10,661.22x = 45,900,476.06
5. Step 5: Solve for x
   x = 45,900,476.06/10,661.22
6. Step 6: Final answer
   x = 4,305.37