Finding the Fourth Proportional to 1,492.50, 2,238.72 and 518.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.50 : 2,238.72 = 518.58 : x
2. Step 2: Convert to fraction form
   1,492.50/2,238.72 = 518.58/x
3. Step 3: Cross multiply
   1,492.50x = 2,238.72 × 518.58
4. Step 4: Simplify right side
   1,492.50x = 1,160,955.42
5. Step 5: Solve for x
   x = 1,160,955.42/1,492.50
6. Step 6: Final answer
   x = 777.86