Finding the Fourth Proportional to 1,515.05, 2,090.71 and 851.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.05 : 2,090.71 = 851.93 : x
2. Step 2: Convert to fraction form
   1,515.05/2,090.71 = 851.93/x
3. Step 3: Cross multiply
   1,515.05x = 2,090.71 × 851.93
4. Step 4: Simplify right side
   1,515.05x = 1,781,138.57
5. Step 5: Solve for x
   x = 1,781,138.57/1,515.05
6. Step 6: Final answer
   x = 1,175.63