Finding the Fourth Proportional to 3,992,871.96, 5,503,707.88 and 3,120,189.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992,871.96 : 5,503,707.88 = 3,120,189.94 : x
2. Step 2: Convert to fraction form
   3,992,871.96/5,503,707.88 = 3,120,189.94/x
3. Step 3: Cross multiply
   3,992,871.96x = 5,503,707.88 × 3,120,189.94
4. Step 4: Simplify right side
   3,992,871.96x = 17,172,613,958,953.89
5. Step 5: Solve for x
   x = 17,172,613,958,953.89/3,992,871.96
6. Step 6: Final answer
   x = 4,300,817.59