Finding the Fourth Proportional to 1,404.47, 1,938.13 and 774.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.47 : 1,938.13 = 774.98 : x
2. Step 2: Convert to fraction form
   1,404.47/1,938.13 = 774.98/x
3. Step 3: Cross multiply
   1,404.47x = 1,938.13 × 774.98
4. Step 4: Simplify right side
   1,404.47x = 1,502,011.99
5. Step 5: Solve for x
   x = 1,502,011.99/1,404.47
6. Step 6: Final answer
   x = 1,069.45