Finding the Fourth Proportional to 3,899.22, 5,848.29 and 1,266.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.22 : 5,848.29 = 1,266.72 : x
2. Step 2: Convert to fraction form
   3,899.22/5,848.29 = 1,266.72/x
3. Step 3: Cross multiply
   3,899.22x = 5,848.29 × 1,266.72
4. Step 4: Simplify right side
   3,899.22x = 7,408,145.91
5. Step 5: Solve for x
   x = 7,408,145.91/3,899.22
6. Step 6: Final answer
   x = 1,899.90