Finding the Fourth Proportional to 1,012.77, 1,518.30 and 602.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.77 : 1,518.30 = 602.10 : x
2. Step 2: Convert to fraction form
   1,012.77/1,518.30 = 602.10/x
3. Step 3: Cross multiply
   1,012.77x = 1,518.30 × 602.10
4. Step 4: Simplify right side
   1,012.77x = 914,168.43
5. Step 5: Solve for x
   x = 914,168.43/1,012.77
6. Step 6: Final answer
   x = 902.64