Finding the Fourth Proportional to 1,820.31, 2,519.24 and 1,776.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.31 : 2,519.24 = 1,776.63 : x
2. Step 2: Convert to fraction form
   1,820.31/2,519.24 = 1,776.63/x
3. Step 3: Cross multiply
   1,820.31x = 2,519.24 × 1,776.63
4. Step 4: Simplify right side
   1,820.31x = 4,475,761.80
5. Step 5: Solve for x
   x = 4,475,761.80/1,820.31
6. Step 6: Final answer
   x = 2,458.79