Finding the Fourth Proportional to 22,301,998.72, 30,778,613.20 and 12,379,815.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,301,998.72 : 30,778,613.20 = 12,379,815.28 : x
2. Step 2: Convert to fraction form
   22,301,998.72/30,778,613.20 = 12,379,815.28/x
3. Step 3: Cross multiply
   22,301,998.72x = 30,778,613.20 × 12,379,815.28
4. Step 4: Simplify right side
   22,301,998.72x = 381,033,545,990,569.69
5. Step 5: Solve for x
   x = 381,033,545,990,569.69/22,301,998.72
6. Step 6: Final answer
   x = 17,085,174.78