Finding the Fourth Proportional to 1,902.15, 2,851.61 and 1,325.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,902.15 : 2,851.61 = 1,325.43 : x
2. Step 2: Convert to fraction form
   1,902.15/2,851.61 = 1,325.43/x
3. Step 3: Cross multiply
   1,902.15x = 2,851.61 × 1,325.43
4. Step 4: Simplify right side
   1,902.15x = 3,779,602.82
5. Step 5: Solve for x
   x = 3,779,602.82/1,902.15
6. Step 6: Final answer
   x = 1,987.02