Finding the Fourth Proportional to 3,887.97, 5,820.72 and 3,487.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,887.97 : 5,820.72 = 3,487.35 : x
2. Step 2: Convert to fraction form
   3,887.97/5,820.72 = 3,487.35/x
3. Step 3: Cross multiply
   3,887.97x = 5,820.72 × 3,487.35
4. Step 4: Simplify right side
   3,887.97x = 20,298,887.89
5. Step 5: Solve for x
   x = 20,298,887.89/3,887.97
6. Step 6: Final answer
   x = 5,220.95