Finding the Fourth Proportional to 1,488.81, 2,054.23 and 899.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.81 : 2,054.23 = 899.34 : x
2. Step 2: Convert to fraction form
   1,488.81/2,054.23 = 899.34/x
3. Step 3: Cross multiply
   1,488.81x = 2,054.23 × 899.34
4. Step 4: Simplify right side
   1,488.81x = 1,847,441.26
5. Step 5: Solve for x
   x = 1,847,441.26/1,488.81
6. Step 6: Final answer
   x = 1,240.88