Finding the Fourth Proportional to 1,191,643.37, 1,644,456.16 and 647,746.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,643.37 : 1,644,456.16 = 647,746.80 : x
2. Step 2: Convert to fraction form
   1,191,643.37/1,644,456.16 = 647,746.80/x
3. Step 3: Cross multiply
   1,191,643.37x = 1,644,456.16 × 647,746.80
4. Step 4: Simplify right side
   1,191,643.37x = 1,065,191,212,141.55
5. Step 5: Solve for x
   x = 1,065,191,212,141.55/1,191,643.37
6. Step 6: Final answer
   x = 893,884.23