Finding the Fourth Proportional to 1,918.78, 2,651.34 and 1,500.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.78 : 2,651.34 = 1,500.20 : x
2. Step 2: Convert to fraction form
   1,918.78/2,651.34 = 1,500.20/x
3. Step 3: Cross multiply
   1,918.78x = 2,651.34 × 1,500.20
4. Step 4: Simplify right side
   1,918.78x = 3,977,540.27
5. Step 5: Solve for x
   x = 3,977,540.27/1,918.78
6. Step 6: Final answer
   x = 2,072.95