Finding the Fourth Proportional to 2,618.91, 3,910.68 and 2,603.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.91 : 3,910.68 = 2,603.52 : x
2. Step 2: Convert to fraction form
   2,618.91/3,910.68 = 2,603.52/x
3. Step 3: Cross multiply
   2,618.91x = 3,910.68 × 2,603.52
4. Step 4: Simplify right side
   2,618.91x = 10,181,533.59
5. Step 5: Solve for x
   x = 10,181,533.59/2,618.91
6. Step 6: Final answer
   x = 3,887.70