Finding the Fourth Proportional to 1,404.23, 1,937.70 and 814.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.23 : 1,937.70 = 814.80 : x
2. Step 2: Convert to fraction form
   1,404.23/1,937.70 = 814.80/x
3. Step 3: Cross multiply
   1,404.23x = 1,937.70 × 814.80
4. Step 4: Simplify right side
   1,404.23x = 1,578,837.96
5. Step 5: Solve for x
   x = 1,578,837.96/1,404.23
6. Step 6: Final answer
   x = 1,124.34