Finding the Fourth Proportional to 12,978,608.05, 19,469,848.92 and 4,780,625.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,608.05 : 19,469,848.92 = 4,780,625.59 : x
2. Step 2: Convert to fraction form
   12,978,608.05/19,469,848.92 = 4,780,625.59/x
3. Step 3: Cross multiply
   12,978,608.05x = 19,469,848.92 × 4,780,625.59
4. Step 4: Simplify right side
   12,978,608.05x = 93,078,057,980,385.88
5. Step 5: Solve for x
   x = 93,078,057,980,385.88/12,978,608.05
6. Step 6: Final answer
   x = 7,171,651.82