Finding the Fourth Proportional to 12,390,185.39, 18,578,896.48 and 5,560,904.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390,185.39 : 18,578,896.48 = 5,560,904.05 : x
2. Step 2: Convert to fraction form
   12,390,185.39/18,578,896.48 = 5,560,904.05/x
3. Step 3: Cross multiply
   12,390,185.39x = 18,578,896.48 × 5,560,904.05
4. Step 4: Simplify right side
   12,390,185.39x = 103,315,460,619,813.25
5. Step 5: Solve for x
   x = 103,315,460,619,813.25/12,390,185.39
6. Step 6: Final answer
   x = 8,338,491.91