Finding the Fourth Proportional to 1,488.29, 2,053.98 and 899.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.29 : 2,053.98 = 899.31 : x
2. Step 2: Convert to fraction form
   1,488.29/2,053.98 = 899.31/x
3. Step 3: Cross multiply
   1,488.29x = 2,053.98 × 899.31
4. Step 4: Simplify right side
   1,488.29x = 1,847,164.75
5. Step 5: Solve for x
   x = 1,847,164.75/1,488.29
6. Step 6: Final answer
   x = 1,241.13