Finding the Fourth Proportional to 22,641.72, 31,245.40 and 12,432.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,641.72 : 31,245.40 = 12,432.64 : x
2. Step 2: Convert to fraction form
   22,641.72/31,245.40 = 12,432.64/x
3. Step 3: Cross multiply
   22,641.72x = 31,245.40 × 12,432.64
4. Step 4: Simplify right side
   22,641.72x = 388,462,809.86
5. Step 5: Solve for x
   x = 388,462,809.86/22,641.72
6. Step 6: Final answer
   x = 17,156.95