Finding the Fourth Proportional to 1,492.42, 2,238.89 and 518.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.42 : 2,238.89 = 518.29 : x
2. Step 2: Convert to fraction form
   1,492.42/2,238.89 = 518.29/x
3. Step 3: Cross multiply
   1,492.42x = 2,238.89 × 518.29
4. Step 4: Simplify right side
   1,492.42x = 1,160,394.30
5. Step 5: Solve for x
   x = 1,160,394.30/1,492.42
6. Step 6: Final answer
   x = 777.53