Finding the Fourth Proportional to 1,422,644.56, 1,963,221.92 and 778,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422,644.56 : 1,963,221.92 = 778,062.72 : x
2. Step 2: Convert to fraction form
   1,422,644.56/1,963,221.92 = 778,062.72/x
3. Step 3: Cross multiply
   1,422,644.56x = 1,963,221.92 × 778,062.72
4. Step 4: Simplify right side
   1,422,644.56x = 1,527,509,787,038.82
5. Step 5: Solve for x
   x = 1,527,509,787,038.82/1,422,644.56
6. Step 6: Final answer
   x = 1,073,711.47