Finding the Fourth Proportional to 2,385.32, 3,579.20 and 1,086.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.32 : 3,579.20 = 1,086.62 : x
2. Step 2: Convert to fraction form
   2,385.32/3,579.20 = 1,086.62/x
3. Step 3: Cross multiply
   2,385.32x = 3,579.20 × 1,086.62
4. Step 4: Simplify right side
   2,385.32x = 3,889,224.87
5. Step 5: Solve for x
   x = 3,889,224.87/2,385.32
6. Step 6: Final answer
   x = 1,630.48