Finding the Fourth Proportional to 1,094.78, 1,642.12 and 602.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.78 : 1,642.12 = 602.15 : x
2. Step 2: Convert to fraction form
   1,094.78/1,642.12 = 602.15/x
3. Step 3: Cross multiply
   1,094.78x = 1,642.12 × 602.15
4. Step 4: Simplify right side
   1,094.78x = 988,809.75
5. Step 5: Solve for x
   x = 988,809.75/1,094.78
6. Step 6: Final answer
   x = 903.20