Finding the Fourth Proportional to 2,217,662.59, 3,060,356.55 and 1,287,456.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217,662.59 : 3,060,356.55 = 1,287,456.65 : x
2. Step 2: Convert to fraction form
   2,217,662.59/3,060,356.55 = 1,287,456.65/x
3. Step 3: Cross multiply
   2,217,662.59x = 3,060,356.55 × 1,287,456.65
4. Step 4: Simplify right side
   2,217,662.59x = 3,940,076,394,491.49
5. Step 5: Solve for x
   x = 3,940,076,394,491.49/2,217,662.59
6. Step 6: Final answer
   x = 1,776,679.83