Finding the Fourth Proportional to 3,820.56, 5,272.27 and 2,142.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.56 : 5,272.27 = 2,142.07 : x
2. Step 2: Convert to fraction form
   3,820.56/5,272.27 = 2,142.07/x
3. Step 3: Cross multiply
   3,820.56x = 5,272.27 × 2,142.07
4. Step 4: Simplify right side
   3,820.56x = 11,293,552.86
5. Step 5: Solve for x
   x = 11,293,552.86/3,820.56
6. Step 6: Final answer
   x = 2,956.00