Finding the Fourth Proportional to 12,864,064.78, 19,277,955.87 and 7,109,389.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864,064.78 : 19,277,955.87 = 7,109,389.81 : x
2. Step 2: Convert to fraction form
   12,864,064.78/19,277,955.87 = 7,109,389.81/x
3. Step 3: Cross multiply
   12,864,064.78x = 19,277,955.87 × 7,109,389.81
4. Step 4: Simplify right side
   12,864,064.78x = 137,054,503,019,807.69
5. Step 5: Solve for x
   x = 137,054,503,019,807.69/12,864,064.78
6. Step 6: Final answer
   x = 10,654,058.83