Finding the Fourth Proportional to 2,158,381.43, 2,978,488.22 and 1,191,490.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,381.43 : 2,978,488.22 = 1,191,490.91 : x
2. Step 2: Convert to fraction form
   2,158,381.43/2,978,488.22 = 1,191,490.91/x
3. Step 3: Cross multiply
   2,158,381.43x = 2,978,488.22 × 1,191,490.91
4. Step 4: Simplify right side
   2,158,381.43x = 3,548,841,618,822.18
5. Step 5: Solve for x
   x = 3,548,841,618,822.18/2,158,381.43
6. Step 6: Final answer
   x = 1,644,214.31