Finding the Fourth Proportional to 2,140.86, 2,953.18 and 1,256.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.86 : 2,953.18 = 1,256.49 : x
2. Step 2: Convert to fraction form
   2,140.86/2,953.18 = 1,256.49/x
3. Step 3: Cross multiply
   2,140.86x = 2,953.18 × 1,256.49
4. Step 4: Simplify right side
   2,140.86x = 3,710,641.14
5. Step 5: Solve for x
   x = 3,710,641.14/2,140.86
6. Step 6: Final answer
   x = 1,733.25