Finding the Fourth Proportional to 2,814.90, 3,885.98 and 1,820.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.90 : 3,885.98 = 1,820.98 : x
2. Step 2: Convert to fraction form
   2,814.90/3,885.98 = 1,820.98/x
3. Step 3: Cross multiply
   2,814.90x = 3,885.98 × 1,820.98
4. Step 4: Simplify right side
   2,814.90x = 7,076,287.61
5. Step 5: Solve for x
   x = 7,076,287.61/2,814.90
6. Step 6: Final answer
   x = 2,513.87