Finding the Fourth Proportional to 22,204.47, 30,649.02 and 12,779.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,204.47 : 30,649.02 = 12,779.31 : x
2. Step 2: Convert to fraction form
   22,204.47/30,649.02 = 12,779.31/x
3. Step 3: Cross multiply
   22,204.47x = 30,649.02 × 12,779.31
4. Step 4: Simplify right side
   22,204.47x = 391,673,327.78
5. Step 5: Solve for x
   x = 391,673,327.78/22,204.47
6. Step 6: Final answer
   x = 17,639.39