Finding the Fourth Proportional to 1,914.72, 2,870.19 and 817.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.72 : 2,870.19 = 817.98 : x
2. Step 2: Convert to fraction form
   1,914.72/2,870.19 = 817.98/x
3. Step 3: Cross multiply
   1,914.72x = 2,870.19 × 817.98
4. Step 4: Simplify right side
   1,914.72x = 2,347,758.02
5. Step 5: Solve for x
   x = 2,347,758.02/1,914.72
6. Step 6: Final answer
   x = 1,226.16