Finding the Fourth Proportional to 2,385.24, 3,579.47 and 924.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.24 : 3,579.47 = 924.20 : x
2. Step 2: Convert to fraction form
   2,385.24/3,579.47 = 924.20/x
3. Step 3: Cross multiply
   2,385.24x = 3,579.47 × 924.20
4. Step 4: Simplify right side
   2,385.24x = 3,308,146.17
5. Step 5: Solve for x
   x = 3,308,146.17/2,385.24
6. Step 6: Final answer
   x = 1,386.92