Finding the Fourth Proportional to 2,548.78, 3,518.85 and 1,666.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.78 : 3,518.85 = 1,666.06 : x
2. Step 2: Convert to fraction form
   2,548.78/3,518.85 = 1,666.06/x
3. Step 3: Cross multiply
   2,548.78x = 3,518.85 × 1,666.06
4. Step 4: Simplify right side
   2,548.78x = 5,862,615.23
5. Step 5: Solve for x
   x = 5,862,615.23/2,548.78
6. Step 6: Final answer
   x = 2,300.17