Finding the Fourth Proportional to 3,820.91, 5,726.70 and 3,129.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.91 : 5,726.70 = 3,129.03 : x
2. Step 2: Convert to fraction form
   3,820.91/5,726.70 = 3,129.03/x
3. Step 3: Cross multiply
   3,820.91x = 5,726.70 × 3,129.03
4. Step 4: Simplify right side
   3,820.91x = 17,919,016.10
5. Step 5: Solve for x
   x = 17,919,016.10/3,820.91
6. Step 6: Final answer
   x = 4,689.73