Finding the Fourth Proportional to 1,592.03, 2,389.37 and 812.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,592.03 : 2,389.37 = 812.61 : x
2. Step 2: Convert to fraction form
   1,592.03/2,389.37 = 812.61/x
3. Step 3: Cross multiply
   1,592.03x = 2,389.37 × 812.61
4. Step 4: Simplify right side
   1,592.03x = 1,941,621.89
5. Step 5: Solve for x
   x = 1,941,621.89/1,592.03
6. Step 6: Final answer
   x = 1,219.59