Finding the Fourth Proportional to 1,899.37, 2,620.56 and 1,113.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.37 : 2,620.56 = 1,113.22 : x
2. Step 2: Convert to fraction form
   1,899.37/2,620.56 = 1,113.22/x
3. Step 3: Cross multiply
   1,899.37x = 2,620.56 × 1,113.22
4. Step 4: Simplify right side
   1,899.37x = 2,917,259.80
5. Step 5: Solve for x
   x = 2,917,259.80/1,899.37
6. Step 6: Final answer
   x = 1,535.91