Finding the Fourth Proportional to 2,158,365, 2,978,465.64 and 1,191,474.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,365 : 2,978,465.64 = 1,191,474.54 : x
2. Step 2: Convert to fraction form
   2,158,365/2,978,465.64 = 1,191,474.54/x
3. Step 3: Cross multiply
   2,158,365x = 2,978,465.64 × 1,191,474.54
4. Step 4: Simplify right side
   2,158,365x = 3,548,765,978,324.81
5. Step 5: Solve for x
   x = 3,548,765,978,324.81/2,158,365
6. Step 6: Final answer
   x = 1,644,191.77