Finding the Fourth Proportional to 11,912,162.72, 16,439,999.31 and 7,018,910.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,912,162.72 : 16,439,999.31 = 7,018,910.60 : x
2. Step 2: Convert to fraction form
   11,912,162.72/16,439,999.31 = 7,018,910.60/x
3. Step 3: Cross multiply
   11,912,162.72x = 16,439,999.31 × 7,018,910.60
4. Step 4: Simplify right side
   11,912,162.72x = 115,390,885,338,751.69
5. Step 5: Solve for x
   x = 115,390,885,338,751.69/11,912,162.72
6. Step 6: Final answer
   x = 9,686,812.39