Finding the Fourth Proportional to 1,663.98, 2,297.88 and 1,426.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.98 : 2,297.88 = 1,426.56 : x
2. Step 2: Convert to fraction form
   1,663.98/2,297.88 = 1,426.56/x
3. Step 3: Cross multiply
   1,663.98x = 2,297.88 × 1,426.56
4. Step 4: Simplify right side
   1,663.98x = 3,278,063.69
5. Step 5: Solve for x
   x = 3,278,063.69/1,663.98
6. Step 6: Final answer
   x = 1,970.01