Finding the Fourth Proportional to 2,156.35, 2,973.43 and 1,657.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.35 : 2,973.43 = 1,657.89 : x
2. Step 2: Convert to fraction form
   2,156.35/2,973.43 = 1,657.89/x
3. Step 3: Cross multiply
   2,156.35x = 2,973.43 × 1,657.89
4. Step 4: Simplify right side
   2,156.35x = 4,929,619.86
5. Step 5: Solve for x
   x = 4,929,619.86/2,156.35
6. Step 6: Final answer
   x = 2,286.09