Finding the Fourth Proportional to 1,549.69, 2,138.60 and 851.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.69 : 2,138.60 = 851.06 : x
2. Step 2: Convert to fraction form
   1,549.69/2,138.60 = 851.06/x
3. Step 3: Cross multiply
   1,549.69x = 2,138.60 × 851.06
4. Step 4: Simplify right side
   1,549.69x = 1,820,084.39
5. Step 5: Solve for x
   x = 1,820,084.39/1,549.69
6. Step 6: Final answer
   x = 1,174.48