Finding the Fourth Proportional to 3,820.61, 5,272.35 and 2,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.61 : 5,272.35 = 2,142.10 : x
2. Step 2: Convert to fraction form
   3,820.61/5,272.35 = 2,142.10/x
3. Step 3: Cross multiply
   3,820.61x = 5,272.35 × 2,142.10
4. Step 4: Simplify right side
   3,820.61x = 11,293,900.94
5. Step 5: Solve for x
   x = 11,293,900.94/3,820.61
6. Step 6: Final answer
   x = 2,956.05