Finding the Fourth Proportional to 2,591.72, 3,885.96 and 1,204.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.72 : 3,885.96 = 1,204.20 : x
2. Step 2: Convert to fraction form
   2,591.72/3,885.96 = 1,204.20/x
3. Step 3: Cross multiply
   2,591.72x = 3,885.96 × 1,204.20
4. Step 4: Simplify right side
   2,591.72x = 4,679,473.03
5. Step 5: Solve for x
   x = 4,679,473.03/2,591.72
6. Step 6: Final answer
   x = 1,805.55