Finding the Fourth Proportional to 3,939,796.88, 5,909,872.34 and 1,207,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,796.88 : 5,909,872.34 = 1,207,144.09 : x
2. Step 2: Convert to fraction form
   3,939,796.88/5,909,872.34 = 1,207,144.09/x
3. Step 3: Cross multiply
   3,939,796.88x = 5,909,872.34 × 1,207,144.09
4. Step 4: Simplify right side
   3,939,796.88x = 7,134,067,467,885.47
5. Step 5: Solve for x
   x = 7,134,067,467,885.47/3,939,796.88
6. Step 6: Final answer
   x = 1,810,770.37