Finding the Fourth Proportional to 3,978,549.98, 5,490,324.61 and 2,212,556.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,549.98 : 5,490,324.61 = 2,212,556.59 : x
2. Step 2: Convert to fraction form
   3,978,549.98/5,490,324.61 = 2,212,556.59/x
3. Step 3: Cross multiply
   3,978,549.98x = 5,490,324.61 × 2,212,556.59
4. Step 4: Simplify right side
   3,978,549.98x = 12,147,653,877,837.48
5. Step 5: Solve for x
   x = 12,147,653,877,837.48/3,978,549.98
6. Step 6: Final answer
   x = 3,053,286.74