Finding the Fourth Proportional to 2,870.83, 4,306.72 and 1,226.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.83 : 4,306.72 = 1,226.40 : x
2. Step 2: Convert to fraction form
   2,870.83/4,306.72 = 1,226.40/x
3. Step 3: Cross multiply
   2,870.83x = 4,306.72 × 1,226.40
4. Step 4: Simplify right side
   2,870.83x = 5,281,761.41
5. Step 5: Solve for x
   x = 5,281,761.41/2,870.83
6. Step 6: Final answer
   x = 1,839.80