Finding the Fourth Proportional to 1,897.78, 2,618.31 and 1,111.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.78 : 2,618.31 = 1,111.27 : x
2. Step 2: Convert to fraction form
   1,897.78/2,618.31 = 1,111.27/x
3. Step 3: Cross multiply
   1,897.78x = 2,618.31 × 1,111.27
4. Step 4: Simplify right side
   1,897.78x = 2,909,649.35
5. Step 5: Solve for x
   x = 2,909,649.35/1,897.78
6. Step 6: Final answer
   x = 1,533.19