Finding the Fourth Proportional to 1,196,978.97, 1,795,335.82 and 428,445.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196,978.97 : 1,795,335.82 = 428,445.98 : x
2. Step 2: Convert to fraction form
   1,196,978.97/1,795,335.82 = 428,445.98/x
3. Step 3: Cross multiply
   1,196,978.97x = 1,795,335.82 × 428,445.98
4. Step 4: Simplify right side
   1,196,978.97x = 769,204,414,829.00
5. Step 5: Solve for x
   x = 769,204,414,829.00/1,196,978.97
6. Step 6: Final answer
   x = 642,621.49