Finding the Fourth Proportional to 861,196.82, 1,291,801.71 and 328,574.66

Step by Step Solution

1. Step 1: Write the proportion equation
   861,196.82 : 1,291,801.71 = 328,574.66 : x
2. Step 2: Convert to fraction form
   861,196.82/1,291,801.71 = 328,574.66/x
3. Step 3: Cross multiply
   861,196.82x = 1,291,801.71 × 328,574.66
4. Step 4: Simplify right side
   861,196.82x = 424,453,307,650.67
5. Step 5: Solve for x
   x = 424,453,307,650.67/861,196.82
6. Step 6: Final answer
   x = 492,864.46