Finding the Fourth Proportional to 1,897.71, 2,618.87 and 1,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,897.71 : 2,618.87 = 1,111.61 : x
2. Step 2: Convert to fraction form
   1,897.71/2,618.87 = 1,111.61/x
3. Step 3: Cross multiply
   1,897.71x = 2,618.87 × 1,111.61
4. Step 4: Simplify right side
   1,897.71x = 2,911,143.43
5. Step 5: Solve for x
   x = 2,911,143.43/1,897.71
6. Step 6: Final answer
   x = 1,534.03