Finding the Fourth Proportional to 2,217,662.84, 3,060,356.89 and 1,287,456.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217,662.84 : 3,060,356.89 = 1,287,456.90 : x
2. Step 2: Convert to fraction form
   2,217,662.84/3,060,356.89 = 1,287,456.90/x
3. Step 3: Cross multiply
   2,217,662.84x = 3,060,356.89 × 1,287,456.90
4. Step 4: Simplify right side
   2,217,662.84x = 3,940,077,602,143.93
5. Step 5: Solve for x
   x = 3,940,077,602,143.93/2,217,662.84
6. Step 6: Final answer
   x = 1,776,680.18