Finding the Fourth Proportional to 2,072.08, 2,859.54 and 1,188.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.08 : 2,859.54 = 1,188.10 : x
2. Step 2: Convert to fraction form
   2,072.08/2,859.54 = 1,188.10/x
3. Step 3: Cross multiply
   2,072.08x = 2,859.54 × 1,188.10
4. Step 4: Simplify right side
   2,072.08x = 3,397,419.47
5. Step 5: Solve for x
   x = 3,397,419.47/2,072.08
6. Step 6: Final answer
   x = 1,639.62