Finding the Fourth Proportional to 1,404.78, 1,938.44 and 845.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.78 : 1,938.44 = 845.14 : x
2. Step 2: Convert to fraction form
   1,404.78/1,938.44 = 845.14/x
3. Step 3: Cross multiply
   1,404.78x = 1,938.44 × 845.14
4. Step 4: Simplify right side
   1,404.78x = 1,638,253.18
5. Step 5: Solve for x
   x = 1,638,253.18/1,404.78
6. Step 6: Final answer
   x = 1,166.20