Finding the Fourth Proportional to 1,478.01, 2,039.72 and 814.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.01 : 2,039.72 = 814.85 : x
2. Step 2: Convert to fraction form
   1,478.01/2,039.72 = 814.85/x
3. Step 3: Cross multiply
   1,478.01x = 2,039.72 × 814.85
4. Step 4: Simplify right side
   1,478.01x = 1,662,065.84
5. Step 5: Solve for x
   x = 1,662,065.84/1,478.01
6. Step 6: Final answer
   x = 1,124.53