Finding the Fourth Proportional to 2,071.42, 2,858.54 and 1,187.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.42 : 2,858.54 = 1,187.19 : x
2. Step 2: Convert to fraction form
   2,071.42/2,858.54 = 1,187.19/x
3. Step 3: Cross multiply
   2,071.42x = 2,858.54 × 1,187.19
4. Step 4: Simplify right side
   2,071.42x = 3,393,624.17
5. Step 5: Solve for x
   x = 3,393,624.17/2,071.42
6. Step 6: Final answer
   x = 1,638.31