Finding the Fourth Proportional to 2,389.78, 3,298.02 and 1,342.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.78 : 3,298.02 = 1,342.18 : x
2. Step 2: Convert to fraction form
   2,389.78/3,298.02 = 1,342.18/x
3. Step 3: Cross multiply
   2,389.78x = 3,298.02 × 1,342.18
4. Step 4: Simplify right side
   2,389.78x = 4,426,536.48
5. Step 5: Solve for x
   x = 4,426,536.48/2,389.78
6. Step 6: Final answer
   x = 1,852.28