Finding the Fourth Proportional to 2,612.60, 3,603.53 and 1,618.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.60 : 3,603.53 = 1,618.35 : x
2. Step 2: Convert to fraction form
   2,612.60/3,603.53 = 1,618.35/x
3. Step 3: Cross multiply
   2,612.60x = 3,603.53 × 1,618.35
4. Step 4: Simplify right side
   2,612.60x = 5,831,772.78
5. Step 5: Solve for x
   x = 5,831,772.78/2,612.60
6. Step 6: Final answer
   x = 2,232.17