Finding the Fourth Proportional to 1,491.15, 2,055.42 and 1,112.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.15 : 2,055.42 = 1,112.87 : x
2. Step 2: Convert to fraction form
   1,491.15/2,055.42 = 1,112.87/x
3. Step 3: Cross multiply
   1,491.15x = 2,055.42 × 1,112.87
4. Step 4: Simplify right side
   1,491.15x = 2,287,420.39
5. Step 5: Solve for x
   x = 2,287,420.39/1,491.15
6. Step 6: Final answer
   x = 1,533.99