Finding the Fourth Proportional to 1,899.05, 2,620.69 and 1,113.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.05 : 2,620.69 = 1,113.10 : x
2. Step 2: Convert to fraction form
   1,899.05/2,620.69 = 1,113.10/x
3. Step 3: Cross multiply
   1,899.05x = 2,620.69 × 1,113.10
4. Step 4: Simplify right side
   1,899.05x = 2,917,076.94
5. Step 5: Solve for x
   x = 2,917,076.94/1,899.05
6. Step 6: Final answer
   x = 1,536.07