Finding the Fourth Proportional to 1,185,578.82, 1,778,372.55 and 287,018.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,578.82 : 1,778,372.55 = 287,018.91 : x
2. Step 2: Convert to fraction form
   1,185,578.82/1,778,372.55 = 287,018.91/x
3. Step 3: Cross multiply
   1,185,578.82x = 1,778,372.55 × 287,018.91
4. Step 4: Simplify right side
   1,185,578.82x = 510,426,550,874.92
5. Step 5: Solve for x
   x = 510,426,550,874.92/1,185,578.82
6. Step 6: Final answer
   x = 430,529.41