Finding the Fourth Proportional to 1,188,168.82, 1,639,759.72 and 678,860.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188,168.82 : 1,639,759.72 = 678,860.26 : x
2. Step 2: Convert to fraction form
   1,188,168.82/1,639,759.72 = 678,860.26/x
3. Step 3: Cross multiply
   1,188,168.82x = 1,639,759.72 × 678,860.26
4. Step 4: Simplify right side
   1,188,168.82x = 1,113,167,709,856.73
5. Step 5: Solve for x
   x = 1,113,167,709,856.73/1,188,168.82
6. Step 6: Final answer
   x = 936,876.72