Finding the Fourth Proportional to 3,986,991.72, 5,983,128.94 and 2,191,129.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986,991.72 : 5,983,128.94 = 2,191,129.32 : x
2. Step 2: Convert to fraction form
   3,986,991.72/5,983,128.94 = 2,191,129.32/x
3. Step 3: Cross multiply
   3,986,991.72x = 5,983,128.94 × 2,191,129.32
4. Step 4: Simplify right side
   3,986,991.72x = 13,109,809,245,774.52
5. Step 5: Solve for x
   x = 13,109,809,245,774.52/3,986,991.72
6. Step 6: Final answer
   x = 3,288,145.59