Finding the Fourth Proportional to 1,899.72, 2,621.77 and 1,103.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.72 : 2,621.77 = 1,103.36 : x
2. Step 2: Convert to fraction form
   1,899.72/2,621.77 = 1,103.36/x
3. Step 3: Cross multiply
   1,899.72x = 2,621.77 × 1,103.36
4. Step 4: Simplify right side
   1,899.72x = 2,892,740.28
5. Step 5: Solve for x
   x = 2,892,740.28/1,899.72
6. Step 6: Final answer
   x = 1,522.72