Finding the Fourth Proportional to 12,005,920.29, 18,009,378.69 and 3,486,256.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,005,920.29 : 18,009,378.69 = 3,486,256.73 : x
2. Step 2: Convert to fraction form
   12,005,920.29/18,009,378.69 = 3,486,256.73/x
3. Step 3: Cross multiply
   12,005,920.29x = 18,009,378.69 × 3,486,256.73
4. Step 4: Simplify right side
   12,005,920.29x = 62,785,317,661,131.09
5. Step 5: Solve for x
   x = 62,785,317,661,131.09/12,005,920.29
6. Step 6: Final answer
   x = 5,229,529.78