Finding the Fourth Proportional to 1,404.55, 1,938.21 and 814.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.55 : 1,938.21 = 814.99 : x
2. Step 2: Convert to fraction form
   1,404.55/1,938.21 = 814.99/x
3. Step 3: Cross multiply
   1,404.55x = 1,938.21 × 814.99
4. Step 4: Simplify right side
   1,404.55x = 1,579,621.77
5. Step 5: Solve for x
   x = 1,579,621.77/1,404.55
6. Step 6: Final answer
   x = 1,124.65