Finding the Fourth Proportional to 12,945,164.75, 17,864,290.73 and 7,143,905.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945,164.75 : 17,864,290.73 = 7,143,905.01 : x
2. Step 2: Convert to fraction form
   12,945,164.75/17,864,290.73 = 7,143,905.01/x
3. Step 3: Cross multiply
   12,945,164.75x = 17,864,290.73 × 7,143,905.01
4. Step 4: Simplify right side
   12,945,164.75x = 127,620,796,010,424.03
5. Step 5: Solve for x
   x = 127,620,796,010,424.03/12,945,164.75
6. Step 6: Final answer
   x = 9,858,568.70