Finding the Fourth Proportional to 2,158,261.20, 2,978,401.01 and 1,191,392.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,261.20 : 2,978,401.01 = 1,191,392.15 : x
2. Step 2: Convert to fraction form
   2,158,261.20/2,978,401.01 = 1,191,392.15/x
3. Step 3: Cross multiply
   2,158,261.20x = 2,978,401.01 × 1,191,392.15
4. Step 4: Simplify right side
   2,158,261.20x = 3,548,443,562,017.11
5. Step 5: Solve for x
   x = 3,548,443,562,017.11/2,158,261.20
6. Step 6: Final answer
   x = 1,644,121.46