Finding the Fourth Proportional to 2,141.48, 3,210.03 and 1,215.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.48 : 3,210.03 = 1,215.08 : x
2. Step 2: Convert to fraction form
   2,141.48/3,210.03 = 1,215.08/x
3. Step 3: Cross multiply
   2,141.48x = 3,210.03 × 1,215.08
4. Step 4: Simplify right side
   2,141.48x = 3,900,440.37
5. Step 5: Solve for x
   x = 3,900,440.37/2,141.48
6. Step 6: Final answer
   x = 1,821.38