Finding the Fourth Proportional to 1,404.30, 1,937.85 and 814.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.30 : 1,937.85 = 814.74 : x
2. Step 2: Convert to fraction form
   1,404.30/1,937.85 = 814.74/x
3. Step 3: Cross multiply
   1,404.30x = 1,937.85 × 814.74
4. Step 4: Simplify right side
   1,404.30x = 1,578,843.91
5. Step 5: Solve for x
   x = 1,578,843.91/1,404.30
6. Step 6: Final answer
   x = 1,124.29