Finding the Fourth Proportional to 2,071.50, 2,858.66 and 1,187.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.50 : 2,858.66 = 1,187.81 : x
2. Step 2: Convert to fraction form
   2,071.50/2,858.66 = 1,187.81/x
3. Step 3: Cross multiply
   2,071.50x = 2,858.66 × 1,187.81
4. Step 4: Simplify right side
   2,071.50x = 3,395,539.00
5. Step 5: Solve for x
   x = 3,395,539.00/2,071.50
6. Step 6: Final answer
   x = 1,639.17