Finding the Fourth Proportional to 2,158,411.35, 2,978,617.17 and 1,191,549.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,411.35 : 2,978,617.17 = 1,191,549.57 : x
2. Step 2: Convert to fraction form
   2,158,411.35/2,978,617.17 = 1,191,549.57/x
3. Step 3: Cross multiply
   2,158,411.35x = 2,978,617.17 × 1,191,549.57
4. Step 4: Simplify right side
   2,158,411.35x = 3,549,170,008,108.12
5. Step 5: Solve for x
   x = 3,549,170,008,108.12/2,158,411.35
6. Step 6: Final answer
   x = 1,644,343.65