Finding the Fourth Proportional to 22,400.32, 30,911.78 and 12,191.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,400.32 : 30,911.78 = 12,191.02 : x
2. Step 2: Convert to fraction form
   22,400.32/30,911.78 = 12,191.02/x
3. Step 3: Cross multiply
   22,400.32x = 30,911.78 × 12,191.02
4. Step 4: Simplify right side
   22,400.32x = 376,846,128.22
5. Step 5: Solve for x
   x = 376,846,128.22/22,400.32
6. Step 6: Final answer
   x = 16,823.25