Finding the Fourth Proportional to 2,118.40, 3,172.48 and 1,875.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.40 : 3,172.48 = 1,875.20 : x
2. Step 2: Convert to fraction form
   2,118.40/3,172.48 = 1,875.20/x
3. Step 3: Cross multiply
   2,118.40x = 3,172.48 × 1,875.20
4. Step 4: Simplify right side
   2,118.40x = 5,949,034.50
5. Step 5: Solve for x
   x = 5,949,034.50/2,118.40
6. Step 6: Final answer
   x = 2,808.27