Finding the Fourth Proportional to 22,578.35, 31,156.89 and 12,506

Step by Step Solution

1. Step 1: Write the proportion equation
   22,578.35 : 31,156.89 = 12,506 : x
2. Step 2: Convert to fraction form
   22,578.35/31,156.89 = 12,506/x
3. Step 3: Cross multiply
   22,578.35x = 31,156.89 × 12,506
4. Step 4: Simplify right side
   22,578.35x = 389,648,066.34
5. Step 5: Solve for x
   x = 389,648,066.34/22,578.35
6. Step 6: Final answer
   x = 17,257.60