Finding the Fourth Proportional to 1,488.79, 2,054.96 and 899.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.79 : 2,054.96 = 899.37 : x
2. Step 2: Convert to fraction form
   1,488.79/2,054.96 = 899.37/x
3. Step 3: Cross multiply
   1,488.79x = 2,054.96 × 899.37
4. Step 4: Simplify right side
   1,488.79x = 1,848,169.38
5. Step 5: Solve for x
   x = 1,848,169.38/1,488.79
6. Step 6: Final answer
   x = 1,241.39