Finding the Fourth Proportional to 1,886.90, 2,603.75 and 1,100.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.90 : 2,603.75 = 1,100.79 : x
2. Step 2: Convert to fraction form
   1,886.90/2,603.75 = 1,100.79/x
3. Step 3: Cross multiply
   1,886.90x = 2,603.75 × 1,100.79
4. Step 4: Simplify right side
   1,886.90x = 2,866,176.46
5. Step 5: Solve for x
   x = 2,866,176.46/1,886.90
6. Step 6: Final answer
   x = 1,518.99