Finding the Fourth Proportional to 2,070.67, 2,857.59 and 1,186.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.67 : 2,857.59 = 1,186.75 : x
2. Step 2: Convert to fraction form
   2,070.67/2,857.59 = 1,186.75/x
3. Step 3: Cross multiply
   2,070.67x = 2,857.59 × 1,186.75
4. Step 4: Simplify right side
   2,070.67x = 3,391,244.93
5. Step 5: Solve for x
   x = 3,391,244.93/2,070.67
6. Step 6: Final answer
   x = 1,637.75