Finding the Fourth Proportional to 1,853.33, 2,557.33 and 1,191.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.33 : 2,557.33 = 1,191.07 : x
2. Step 2: Convert to fraction form
   1,853.33/2,557.33 = 1,191.07/x
3. Step 3: Cross multiply
   1,853.33x = 2,557.33 × 1,191.07
4. Step 4: Simplify right side
   1,853.33x = 3,045,959.26
5. Step 5: Solve for x
   x = 3,045,959.26/1,853.33
6. Step 6: Final answer
   x = 1,643.51