Finding the Fourth Proportional to 2,071.89, 2,859.57 and 1,187.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.89 : 2,859.57 = 1,187.52 : x
2. Step 2: Convert to fraction form
   2,071.89/2,859.57 = 1,187.52/x
3. Step 3: Cross multiply
   2,071.89x = 2,859.57 × 1,187.52
4. Step 4: Simplify right side
   2,071.89x = 3,395,796.57
5. Step 5: Solve for x
   x = 3,395,796.57/2,071.89
6. Step 6: Final answer
   x = 1,638.98