Finding the Fourth Proportional to 2,039.01, 2,813.80 and 1,242.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.01 : 2,813.80 = 1,242.15 : x
2. Step 2: Convert to fraction form
   2,039.01/2,813.80 = 1,242.15/x
3. Step 3: Cross multiply
   2,039.01x = 2,813.80 × 1,242.15
4. Step 4: Simplify right side
   2,039.01x = 3,495,161.67
5. Step 5: Solve for x
   x = 3,495,161.67/2,039.01
6. Step 6: Final answer
   x = 1,714.15