Finding the Fourth Proportional to 3,945,162.88, 5,918,081.64 and 1,386,155.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,162.88 : 5,918,081.64 = 1,386,155.40 : x
2. Step 2: Convert to fraction form
   3,945,162.88/5,918,081.64 = 1,386,155.40/x
3. Step 3: Cross multiply
   3,945,162.88x = 5,918,081.64 × 1,386,155.40
4. Step 4: Simplify right side
   3,945,162.88x = 8,203,380,822,926.86
5. Step 5: Solve for x
   x = 8,203,380,822,926.86/3,945,162.88
6. Step 6: Final answer
   x = 2,079,351.62