Finding the Fourth Proportional to 2,158,554.72, 2,978,809.31 and 1,191,686.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,554.72 : 2,978,809.31 = 1,191,686.58 : x
2. Step 2: Convert to fraction form
   2,158,554.72/2,978,809.31 = 1,191,686.58/x
3. Step 3: Cross multiply
   2,158,554.72x = 2,978,809.31 × 1,191,686.58
4. Step 4: Simplify right side
   2,158,554.72x = 3,549,807,079,106.06
5. Step 5: Solve for x
   x = 3,549,807,079,106.06/2,158,554.72
6. Step 6: Final answer
   x = 1,644,529.58