Finding the Fourth Proportional to 2,858.77, 3,945.73 and 1,810.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.77 : 3,945.73 = 1,810.63 : x
2. Step 2: Convert to fraction form
   2,858.77/3,945.73 = 1,810.63/x
3. Step 3: Cross multiply
   2,858.77x = 3,945.73 × 1,810.63
4. Step 4: Simplify right side
   2,858.77x = 7,144,237.38
5. Step 5: Solve for x
   x = 7,144,237.38/2,858.77
6. Step 6: Final answer
   x = 2,499.06