Finding the Fourth Proportional to 2,158,591.92, 3,237,323.40 and 641,866.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,591.92 : 3,237,323.40 = 641,866.56 : x
2. Step 2: Convert to fraction form
   2,158,591.92/3,237,323.40 = 641,866.56/x
3. Step 3: Cross multiply
   2,158,591.92x = 3,237,323.40 × 641,866.56
4. Step 4: Simplify right side
   2,158,591.92x = 2,077,929,634,365.50
5. Step 5: Solve for x
   x = 2,077,929,634,365.50/2,158,591.92
6. Step 6: Final answer
   x = 962,631.99