Finding the Fourth Proportional to 2,663.64, 3,970.83 and 2,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.64 : 3,970.83 = 2,621.52 : x
2. Step 2: Convert to fraction form
   2,663.64/3,970.83 = 2,621.52/x
3. Step 3: Cross multiply
   2,663.64x = 3,970.83 × 2,621.52
4. Step 4: Simplify right side
   2,663.64x = 10,409,610.26
5. Step 5: Solve for x
   x = 10,409,610.26/2,663.64
6. Step 6: Final answer
   x = 3,908.04