Finding the Fourth Proportional to 1,404.45, 1,938.29 and 845.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.45 : 1,938.29 = 845.10 : x
2. Step 2: Convert to fraction form
   1,404.45/1,938.29 = 845.10/x
3. Step 3: Cross multiply
   1,404.45x = 1,938.29 × 845.10
4. Step 4: Simplify right side
   1,404.45x = 1,638,044.65
5. Step 5: Solve for x
   x = 1,638,044.65/1,404.45
6. Step 6: Final answer
   x = 1,166.32