Finding the Fourth Proportional to 2,124.16, 2,930.56 and 1,240

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.16 : 2,930.56 = 1,240 : x
2. Step 2: Convert to fraction form
   2,124.16/2,930.56 = 1,240/x
3. Step 3: Cross multiply
   2,124.16x = 2,930.56 × 1,240
4. Step 4: Simplify right side
   2,124.16x = 3,633,894.40
5. Step 5: Solve for x
   x = 3,633,894.40/2,124.16
6. Step 6: Final answer
   x = 1,710.74