Finding the Fourth Proportional to 1,111.88, 1,657.69 and 1,083.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.88 : 1,657.69 = 1,083.48 : x
2. Step 2: Convert to fraction form
   1,111.88/1,657.69 = 1,083.48/x
3. Step 3: Cross multiply
   1,111.88x = 1,657.69 × 1,083.48
4. Step 4: Simplify right side
   1,111.88x = 1,796,068.54
5. Step 5: Solve for x
   x = 1,796,068.54/1,111.88
6. Step 6: Final answer
   x = 1,615.34