Finding the Fourth Proportional to 1,218.78, 1,826.91 and 602.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218.78 : 1,826.91 = 602.10 : x
2. Step 2: Convert to fraction form
   1,218.78/1,826.91 = 602.10/x
3. Step 3: Cross multiply
   1,218.78x = 1,826.91 × 602.10
4. Step 4: Simplify right side
   1,218.78x = 1,099,982.51
5. Step 5: Solve for x
   x = 1,099,982.51/1,218.78
6. Step 6: Final answer
   x = 902.53