Finding the Fourth Proportional to 2,817.86, 3,888.67 and 1,558.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.86 : 3,888.67 = 1,558.89 : x
2. Step 2: Convert to fraction form
   2,817.86/3,888.67 = 1,558.89/x
3. Step 3: Cross multiply
   2,817.86x = 3,888.67 × 1,558.89
4. Step 4: Simplify right side
   2,817.86x = 6,061,993.23
5. Step 5: Solve for x
   x = 6,061,993.23/2,817.86
6. Step 6: Final answer
   x = 2,151.28