Finding the Fourth Proportional to 2,158,431.12, 2,978,597.12 and 1,191,536.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,431.12 : 2,978,597.12 = 1,191,536.54 : x
2. Step 2: Convert to fraction form
   2,158,431.12/2,978,597.12 = 1,191,536.54/x
3. Step 3: Cross multiply
   2,158,431.12x = 2,978,597.12 × 1,191,536.54
4. Step 4: Simplify right side
   2,158,431.12x = 3,549,107,306,418.77
5. Step 5: Solve for x
   x = 3,549,107,306,418.77/2,158,431.12
6. Step 6: Final answer
   x = 1,644,299.54