Finding the Fourth Proportional to 2,158,451.07, 2,978,686.62 and 1,191,581.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,451.07 : 2,978,686.62 = 1,191,581.88 : x
2. Step 2: Convert to fraction form
   2,158,451.07/2,978,686.62 = 1,191,581.88/x
3. Step 3: Cross multiply
   2,158,451.07x = 2,978,686.62 × 1,191,581.88
4. Step 4: Simplify right side
   2,158,451.07x = 3,549,349,002,590.45
5. Step 5: Solve for x
   x = 3,549,349,002,590.45/2,158,451.07
6. Step 6: Final answer
   x = 1,644,396.32