Finding the Fourth Proportional to 2,071.32, 3,106.20 and 1,290.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.32 : 3,106.20 = 1,290.18 : x
2. Step 2: Convert to fraction form
   2,071.32/3,106.20 = 1,290.18/x
3. Step 3: Cross multiply
   2,071.32x = 3,106.20 × 1,290.18
4. Step 4: Simplify right side
   2,071.32x = 4,007,557.12
5. Step 5: Solve for x
   x = 4,007,557.12/2,071.32
6. Step 6: Final answer
   x = 1,934.78