Finding the Fourth Proportional to 2,072.79, 2,860.73 and 1,188.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.79 : 2,860.73 = 1,188.43 : x
2. Step 2: Convert to fraction form
   2,072.79/2,860.73 = 1,188.43/x
3. Step 3: Cross multiply
   2,072.79x = 2,860.73 × 1,188.43
4. Step 4: Simplify right side
   2,072.79x = 3,399,768.72
5. Step 5: Solve for x
   x = 3,399,768.72/2,072.79
6. Step 6: Final answer
   x = 1,640.19