Finding the Fourth Proportional to 1,278,064.56, 1,763,667.48 and 697,253.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,064.56 : 1,763,667.48 = 697,253.12 : x
2. Step 2: Convert to fraction form
   1,278,064.56/1,763,667.48 = 697,253.12/x
3. Step 3: Cross multiply
   1,278,064.56x = 1,763,667.48 × 697,253.12
4. Step 4: Simplify right side
   1,278,064.56x = 1,229,722,653,072.54
5. Step 5: Solve for x
   x = 1,229,722,653,072.54/1,278,064.56
6. Step 6: Final answer
   x = 962,175.69