Finding the Fourth Proportional to 2,140.02, 3,209.01 and 1,215.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.02 : 3,209.01 = 1,215.34 : x
2. Step 2: Convert to fraction form
   2,140.02/3,209.01 = 1,215.34/x
3. Step 3: Cross multiply
   2,140.02x = 3,209.01 × 1,215.34
4. Step 4: Simplify right side
   2,140.02x = 3,900,025.63
5. Step 5: Solve for x
   x = 3,900,025.63/2,140.02
6. Step 6: Final answer
   x = 1,822.42