Finding the Fourth Proportional to 1,861.21, 2,790.73 and 995.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.21 : 2,790.73 = 995.05 : x
2. Step 2: Convert to fraction form
   1,861.21/2,790.73 = 995.05/x
3. Step 3: Cross multiply
   1,861.21x = 2,790.73 × 995.05
4. Step 4: Simplify right side
   1,861.21x = 2,776,915.89
5. Step 5: Solve for x
   x = 2,776,915.89/1,861.21
6. Step 6: Final answer
   x = 1,491.99