Finding the Fourth Proportional to 3,899.86, 5,842.03 and 3,580.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.86 : 5,842.03 = 3,580.92 : x
2. Step 2: Convert to fraction form
   3,899.86/5,842.03 = 3,580.92/x
3. Step 3: Cross multiply
   3,899.86x = 5,842.03 × 3,580.92
4. Step 4: Simplify right side
   3,899.86x = 20,919,842.07
5. Step 5: Solve for x
   x = 20,919,842.07/3,899.86
6. Step 6: Final answer
   x = 5,364.25