Finding the Fourth Proportional to 2,656.10, 3,985.97 and 924.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.10 : 3,985.97 = 924.72 : x
2. Step 2: Convert to fraction form
   2,656.10/3,985.97 = 924.72/x
3. Step 3: Cross multiply
   2,656.10x = 3,985.97 × 924.72
4. Step 4: Simplify right side
   2,656.10x = 3,685,906.18
5. Step 5: Solve for x
   x = 3,685,906.18/2,656.10
6. Step 6: Final answer
   x = 1,387.71