Finding the Fourth Proportional to 1,544.85, 2,131.89 and 846.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.85 : 2,131.89 = 846.21 : x
2. Step 2: Convert to fraction form
   1,544.85/2,131.89 = 846.21/x
3. Step 3: Cross multiply
   1,544.85x = 2,131.89 × 846.21
4. Step 4: Simplify right side
   1,544.85x = 1,804,026.64
5. Step 5: Solve for x
   x = 1,804,026.64/1,544.85
6. Step 6: Final answer
   x = 1,167.77