Finding the Fourth Proportional to 1,897.40, 2,618.66 and 1,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.40 : 2,618.66 = 1,111.30 : x
2. Step 2: Convert to fraction form
   1,897.40/2,618.66 = 1,111.30/x
3. Step 3: Cross multiply
   1,897.40x = 2,618.66 × 1,111.30
4. Step 4: Simplify right side
   1,897.40x = 2,910,116.86
5. Step 5: Solve for x
   x = 2,910,116.86/1,897.40
6. Step 6: Final answer
   x = 1,533.74