Finding the Fourth Proportional to 2,187.02, 3,003.40 and 1,872.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.02 : 3,003.40 = 1,872.30 : x
2. Step 2: Convert to fraction form
   2,187.02/3,003.40 = 1,872.30/x
3. Step 3: Cross multiply
   2,187.02x = 3,003.40 × 1,872.30
4. Step 4: Simplify right side
   2,187.02x = 5,623,265.82
5. Step 5: Solve for x
   x = 5,623,265.82/2,187.02
6. Step 6: Final answer
   x = 2,571.20