Finding the Fourth Proportional to 2,152.43, 2,970.35 and 1,256.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.43 : 2,970.35 = 1,256.70 : x
2. Step 2: Convert to fraction form
   2,152.43/2,970.35 = 1,256.70/x
3. Step 3: Cross multiply
   2,152.43x = 2,970.35 × 1,256.70
4. Step 4: Simplify right side
   2,152.43x = 3,732,832.56
5. Step 5: Solve for x
   x = 3,732,832.56/2,152.43
6. Step 6: Final answer
   x = 1,734.25