Finding the Fourth Proportional to 13,978,402.14, 19,296,147.09 and 9,397,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978,402.14 : 19,296,147.09 = 9,397,380.72 : x
2. Step 2: Convert to fraction form
   13,978,402.14/19,296,147.09 = 9,397,380.72/x
3. Step 3: Cross multiply
   13,978,402.14x = 19,296,147.09 × 9,397,380.72
4. Step 4: Simplify right side
   13,978,402.14x = 181,333,240,633,850.12
5. Step 5: Solve for x
   x = 181,333,240,633,850.12/13,978,402.14
6. Step 6: Final answer
   x = 12,972,386.89