Finding the Fourth Proportional to 21,920,978.46, 30,251,007.72 and 12,132,097.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,920,978.46 : 30,251,007.72 = 12,132,097.68 : x
2. Step 2: Convert to fraction form
   21,920,978.46/30,251,007.72 = 12,132,097.68/x
3. Step 3: Cross multiply
   21,920,978.46x = 30,251,007.72 × 12,132,097.68
4. Step 4: Simplify right side
   21,920,978.46x = 367,008,180,577,474.06
5. Step 5: Solve for x
   x = 367,008,180,577,474.06/21,920,978.46
6. Step 6: Final answer
   x = 16,742,326.59