Finding the Fourth Proportional to 2,070.72, 2,857.50 and 1,186.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.72 : 2,857.50 = 1,186.48 : x
2. Step 2: Convert to fraction form
   2,070.72/2,857.50 = 1,186.48/x
3. Step 3: Cross multiply
   2,070.72x = 2,857.50 × 1,186.48
4. Step 4: Simplify right side
   2,070.72x = 3,390,366.60
5. Step 5: Solve for x
   x = 3,390,366.60/2,070.72
6. Step 6: Final answer
   x = 1,637.29