Finding the Fourth Proportional to 22,786.68, 31,445.55 and 12,715.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,786.68 : 31,445.55 = 12,715.01 : x
2. Step 2: Convert to fraction form
   22,786.68/31,445.55 = 12,715.01/x
3. Step 3: Cross multiply
   22,786.68x = 31,445.55 × 12,715.01
4. Step 4: Simplify right side
   22,786.68x = 399,830,443.40
5. Step 5: Solve for x
   x = 399,830,443.40/22,786.68
6. Step 6: Final answer
   x = 17,546.67