Finding the Fourth Proportional to 1,898.72, 2,620.86 and 1,112.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.72 : 2,620.86 = 1,112.75 : x
2. Step 2: Convert to fraction form
   1,898.72/2,620.86 = 1,112.75/x
3. Step 3: Cross multiply
   1,898.72x = 2,620.86 × 1,112.75
4. Step 4: Simplify right side
   1,898.72x = 2,916,361.97
5. Step 5: Solve for x
   x = 2,916,361.97/1,898.72
6. Step 6: Final answer
   x = 1,535.96