Finding the Fourth Proportional to 2,618.02, 3,611.27 and 1,555.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.02 : 3,611.27 = 1,555.07 : x
2. Step 2: Convert to fraction form
   2,618.02/3,611.27 = 1,555.07/x
3. Step 3: Cross multiply
   2,618.02x = 3,611.27 × 1,555.07
4. Step 4: Simplify right side
   2,618.02x = 5,615,751.81
5. Step 5: Solve for x
   x = 5,615,751.81/2,618.02
6. Step 6: Final answer
   x = 2,145.04