Finding the Fourth Proportional to 22,783.51, 31,443.68 and 12,715.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,783.51 : 31,443.68 = 12,715.45 : x
2. Step 2: Convert to fraction form
   22,783.51/31,443.68 = 12,715.45/x
3. Step 3: Cross multiply
   22,783.51x = 31,443.68 × 12,715.45
4. Step 4: Simplify right side
   22,783.51x = 399,820,540.86
5. Step 5: Solve for x
   x = 399,820,540.86/22,783.51
6. Step 6: Final answer
   x = 17,548.68