Finding the Fourth Proportional to 2,158,387.43, 2,978,496.50 and 1,191,496.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,387.43 : 2,978,496.50 = 1,191,496.91 : x
2. Step 2: Convert to fraction form
   2,158,387.43/2,978,496.50 = 1,191,496.91/x
3. Step 3: Cross multiply
   2,158,387.43x = 2,978,496.50 × 1,191,496.91
4. Step 4: Simplify right side
   2,158,387.43x = 3,548,869,355,345.85
5. Step 5: Solve for x
   x = 3,548,869,355,345.85/2,158,387.43
6. Step 6: Final answer
   x = 1,644,222.59