Finding the Fourth Proportional to 1,171,152.06, 1,756,297.77 and 402,431.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171,152.06 : 1,756,297.77 = 402,431.76 : x
2. Step 2: Convert to fraction form
   1,171,152.06/1,756,297.77 = 402,431.76/x
3. Step 3: Cross multiply
   1,171,152.06x = 1,756,297.77 × 402,431.76
4. Step 4: Simplify right side
   1,171,152.06x = 706,790,002,665.18
5. Step 5: Solve for x
   x = 706,790,002,665.18/1,171,152.06
6. Step 6: Final answer
   x = 603,499.77