Finding the Fourth Proportional to 2,157.35, 2,973.31 and 1,857.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.35 : 2,973.31 = 1,857.83 : x
2. Step 2: Convert to fraction form
   2,157.35/2,973.31 = 1,857.83/x
3. Step 3: Cross multiply
   2,157.35x = 2,973.31 × 1,857.83
4. Step 4: Simplify right side
   2,157.35x = 5,523,885.01
5. Step 5: Solve for x
   x = 5,523,885.01/2,157.35
6. Step 6: Final answer
   x = 2,560.50