Finding the Fourth Proportional to 21,992,388.72, 30,349,487.16 and 12,823,260.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,992,388.72 : 30,349,487.16 = 12,823,260.72 : x
2. Step 2: Convert to fraction form
   21,992,388.72/30,349,487.16 = 12,823,260.72/x
3. Step 3: Cross multiply
   21,992,388.72x = 30,349,487.16 × 12,823,260.72
4. Step 4: Simplify right side
   21,992,388.72x = 389,179,386,570,972.38
5. Step 5: Solve for x
   x = 389,179,386,570,972.38/21,992,388.72
6. Step 6: Final answer
   x = 17,696,094.39