Finding the Fourth Proportional to 1,554.29, 2,142.80 and 1,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.29 : 2,142.80 = 1,111.42 : x
2. Step 2: Convert to fraction form
   1,554.29/2,142.80 = 1,111.42/x
3. Step 3: Cross multiply
   1,554.29x = 2,142.80 × 1,111.42
4. Step 4: Simplify right side
   1,554.29x = 2,381,540.06
5. Step 5: Solve for x
   x = 2,381,540.06/1,554.29
6. Step 6: Final answer
   x = 1,532.24