Finding the Fourth Proportional to 28,338,105.33, 42,487,435.53 and 12,555,045.81

Step by Step Solution

1. Step 1: Write the proportion equation
   28,338,105.33 : 42,487,435.53 = 12,555,045.81 : x
2. Step 2: Convert to fraction form
   28,338,105.33/42,487,435.53 = 12,555,045.81/x
3. Step 3: Cross multiply
   28,338,105.33x = 42,487,435.53 × 12,555,045.81
4. Step 4: Simplify right side
   28,338,105.33x = 533,431,699,428,571.69
5. Step 5: Solve for x
   x = 533,431,699,428,571.69/28,338,105.33
6. Step 6: Final answer
   x = 18,823,830.78