Finding the Fourth Proportional to 1,549.89, 2,138.82 and 851.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.89 : 2,138.82 = 851.25 : x
2. Step 2: Convert to fraction form
   1,549.89/2,138.82 = 851.25/x
3. Step 3: Cross multiply
   1,549.89x = 2,138.82 × 851.25
4. Step 4: Simplify right side
   1,549.89x = 1,820,670.53
5. Step 5: Solve for x
   x = 1,820,670.53/1,549.89
6. Step 6: Final answer
   x = 1,174.71