Finding the Fourth Proportional to 2,385.37, 3,574.21 and 1,290.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.37 : 3,574.21 = 1,290.25 : x
2. Step 2: Convert to fraction form
   2,385.37/3,574.21 = 1,290.25/x
3. Step 3: Cross multiply
   2,385.37x = 3,574.21 × 1,290.25
4. Step 4: Simplify right side
   2,385.37x = 4,611,624.45
5. Step 5: Solve for x
   x = 4,611,624.45/2,385.37
6. Step 6: Final answer
   x = 1,933.30