Finding the Fourth Proportional to 1,377,969.58, 2,066,820.72 and 418,433.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377,969.58 : 2,066,820.72 = 418,433.48 : x
2. Step 2: Convert to fraction form
   1,377,969.58/2,066,820.72 = 418,433.48/x
3. Step 3: Cross multiply
   1,377,969.58x = 2,066,820.72 × 418,433.48
4. Step 4: Simplify right side
   1,377,969.58x = 864,826,986,405.71
5. Step 5: Solve for x
   x = 864,826,986,405.71/1,377,969.58
6. Step 6: Final answer
   x = 627,609.64