Finding the Fourth Proportional to 139,227,408.24, 207,819,130.89 and 128,967,054

Step by Step Solution

1. Step 1: Write the proportion equation
   139,227,408.24 : 207,819,130.89 = 128,967,054 : x
2. Step 2: Convert to fraction form
   139,227,408.24/207,819,130.89 = 128,967,054/x
3. Step 3: Cross multiply
   139,227,408.24x = 207,819,130.89 × 128,967,054
4. Step 4: Simplify right side
   139,227,408.24x = 26,801,821,075,723,696
5. Step 5: Solve for x
   x = 26,801,821,075,723,696/139,227,408.24
6. Step 6: Final answer
   x = 192,503,914.38