Finding the Fourth Proportional to 12,390,188.88, 18,578,901.71 and 5,560,907.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390,188.88 : 18,578,901.71 = 5,560,907.57 : x
2. Step 2: Convert to fraction form
   12,390,188.88/18,578,901.71 = 5,560,907.57/x
3. Step 3: Cross multiply
   12,390,188.88x = 18,578,901.71 × 5,560,907.57
4. Step 4: Simplify right side
   12,390,188.88x = 103,315,555,040,725.89
5. Step 5: Solve for x
   x = 103,315,555,040,725.89/12,390,188.88
6. Step 6: Final answer
   x = 8,338,497.18