Finding the Fourth Proportional to 2,120.79, 3,181.52 and 1,025.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.79 : 3,181.52 = 1,025.24 : x
2. Step 2: Convert to fraction form
   2,120.79/3,181.52 = 1,025.24/x
3. Step 3: Cross multiply
   2,120.79x = 3,181.52 × 1,025.24
4. Step 4: Simplify right side
   2,120.79x = 3,261,808.22
5. Step 5: Solve for x
   x = 3,261,808.22/2,120.79
6. Step 6: Final answer
   x = 1,538.01