Finding the Fourth Proportional to 3,884.61, 5,360.56 and 2,116.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,884.61 : 5,360.56 = 2,116.15 : x
2. Step 2: Convert to fraction form
   3,884.61/5,360.56 = 2,116.15/x
3. Step 3: Cross multiply
   3,884.61x = 5,360.56 × 2,116.15
4. Step 4: Simplify right side
   3,884.61x = 11,343,749.04
5. Step 5: Solve for x
   x = 11,343,749.04/3,884.61
6. Step 6: Final answer
   x = 2,920.18