Finding the Fourth Proportional to 1,339.34, 2,009.37 and 1,210.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.34 : 2,009.37 = 1,210.82 : x
2. Step 2: Convert to fraction form
   1,339.34/2,009.37 = 1,210.82/x
3. Step 3: Cross multiply
   1,339.34x = 2,009.37 × 1,210.82
4. Step 4: Simplify right side
   1,339.34x = 2,432,985.38
5. Step 5: Solve for x
   x = 2,432,985.38/1,339.34
6. Step 6: Final answer
   x = 1,816.56