Finding the Fourth Proportional to 2,870.17, 4,305.45 and 1,226.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.17 : 4,305.45 = 1,226.71 : x
2. Step 2: Convert to fraction form
   2,870.17/4,305.45 = 1,226.71/x
3. Step 3: Cross multiply
   2,870.17x = 4,305.45 × 1,226.71
4. Step 4: Simplify right side
   2,870.17x = 5,281,538.57
5. Step 5: Solve for x
   x = 5,281,538.57/2,870.17
6. Step 6: Final answer
   x = 1,840.15