Finding the Fourth Proportional to 1,477.72, 2,039.17 and 814.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.72 : 2,039.17 = 814.45 : x
2. Step 2: Convert to fraction form
   1,477.72/2,039.17 = 814.45/x
3. Step 3: Cross multiply
   1,477.72x = 2,039.17 × 814.45
4. Step 4: Simplify right side
   1,477.72x = 1,660,803.03
5. Step 5: Solve for x
   x = 1,660,803.03/1,477.72
6. Step 6: Final answer
   x = 1,123.90