Finding the Fourth Proportional to 1,488.18, 2,053.90 and 898.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.18 : 2,053.90 = 898.80 : x
2. Step 2: Convert to fraction form
   1,488.18/2,053.90 = 898.80/x
3. Step 3: Cross multiply
   1,488.18x = 2,053.90 × 898.80
4. Step 4: Simplify right side
   1,488.18x = 1,846,045.32
5. Step 5: Solve for x
   x = 1,846,045.32/1,488.18
6. Step 6: Final answer
   x = 1,240.47