Finding the Fourth Proportional to 22,431,128.64, 30,956,416.32 and 12,509,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431,128.64 : 30,956,416.32 = 12,509,130.72 : x
2. Step 2: Convert to fraction form
   22,431,128.64/30,956,416.32 = 12,509,130.72/x
3. Step 3: Cross multiply
   22,431,128.64x = 30,956,416.32 × 12,509,130.72
4. Step 4: Simplify right side
   22,431,128.64x = 387,237,858,369,621.38
5. Step 5: Solve for x
   x = 387,237,858,369,621.38/22,431,128.64
6. Step 6: Final answer
   x = 17,263,413.92