Finding the Fourth Proportional to 2,385.70, 3,580.06 and 1,290.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.70 : 3,580.06 = 1,290.82 : x
2. Step 2: Convert to fraction form
   2,385.70/3,580.06 = 1,290.82/x
3. Step 3: Cross multiply
   2,385.70x = 3,580.06 × 1,290.82
4. Step 4: Simplify right side
   2,385.70x = 4,621,213.05
5. Step 5: Solve for x
   x = 4,621,213.05/2,385.70
6. Step 6: Final answer
   x = 1,937.05