Finding the Fourth Proportional to 1,376.05, 1,899.32 and 851.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.05 : 1,899.32 = 851.79 : x
2. Step 2: Convert to fraction form
   1,376.05/1,899.32 = 851.79/x
3. Step 3: Cross multiply
   1,376.05x = 1,899.32 × 851.79
4. Step 4: Simplify right side
   1,376.05x = 1,617,821.78
5. Step 5: Solve for x
   x = 1,617,821.78/1,376.05
6. Step 6: Final answer
   x = 1,175.70