Finding the Fourth Proportional to 2,140.47, 2,953.71 and 1,256.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.47 : 2,953.71 = 1,256.22 : x
2. Step 2: Convert to fraction form
   2,140.47/2,953.71 = 1,256.22/x
3. Step 3: Cross multiply
   2,140.47x = 2,953.71 × 1,256.22
4. Step 4: Simplify right side
   2,140.47x = 3,710,509.58
5. Step 5: Solve for x
   x = 3,710,509.58/2,140.47
6. Step 6: Final answer
   x = 1,733.50