Finding the Fourth Proportional to 21,928,925.12, 30,262,155.99 and 12,139,532.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928,925.12 : 30,262,155.99 = 12,139,532.78 : x
2. Step 2: Convert to fraction form
   21,928,925.12/30,262,155.99 = 12,139,532.78/x
3. Step 3: Cross multiply
   21,928,925.12x = 30,262,155.99 × 12,139,532.78
4. Step 4: Simplify right side
   21,928,925.12x = 367,368,434,634,078.31
5. Step 5: Solve for x
   x = 367,368,434,634,078.31/21,928,925.12
6. Step 6: Final answer
   x = 16,752,687.72