Finding the Fourth Proportional to 2,385.59, 3,578.72 and 924.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.59 : 3,578.72 = 924.75 : x
2. Step 2: Convert to fraction form
   2,385.59/3,578.72 = 924.75/x
3. Step 3: Cross multiply
   2,385.59x = 3,578.72 × 924.75
4. Step 4: Simplify right side
   2,385.59x = 3,309,416.70
5. Step 5: Solve for x
   x = 3,309,416.70/2,385.59
6. Step 6: Final answer
   x = 1,387.26