Finding the Fourth Proportional to 2,606.78, 3,593.64 and 1,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.78 : 3,593.64 = 1,611.50 : x
2. Step 2: Convert to fraction form
   2,606.78/3,593.64 = 1,611.50/x
3. Step 3: Cross multiply
   2,606.78x = 3,593.64 × 1,611.50
4. Step 4: Simplify right side
   2,606.78x = 5,791,132.89
5. Step 5: Solve for x
   x = 5,791,132.89/2,606.78
6. Step 6: Final answer
   x = 2,221.57