Finding the Fourth Proportional to 2,156.70, 2,972.16 and 1,730.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.70 : 2,972.16 = 1,730.82 : x
2. Step 2: Convert to fraction form
   2,156.70/2,972.16 = 1,730.82/x
3. Step 3: Cross multiply
   2,156.70x = 2,972.16 × 1,730.82
4. Step 4: Simplify right side
   2,156.70x = 5,144,273.97
5. Step 5: Solve for x
   x = 5,144,273.97/2,156.70
6. Step 6: Final answer
   x = 2,385.25