Finding the Fourth Proportional to 2,385.45, 3,573.32 and 2,139.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.45 : 3,573.32 = 2,139.62 : x
2. Step 2: Convert to fraction form
   2,385.45/3,573.32 = 2,139.62/x
3. Step 3: Cross multiply
   2,385.45x = 3,573.32 × 2,139.62
4. Step 4: Simplify right side
   2,385.45x = 7,645,518.37
5. Step 5: Solve for x
   x = 7,645,518.37/2,385.45
6. Step 6: Final answer
   x = 3,205.06