Finding the Fourth Proportional to 3,820.31, 5,272.05 and 2,141.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.31 : 5,272.05 = 2,141.72 : x
2. Step 2: Convert to fraction form
   3,820.31/5,272.05 = 2,141.72/x
3. Step 3: Cross multiply
   3,820.31x = 5,272.05 × 2,141.72
4. Step 4: Simplify right side
   3,820.31x = 11,291,254.93
5. Step 5: Solve for x
   x = 11,291,254.93/3,820.31
6. Step 6: Final answer
   x = 2,955.59