Finding the Fourth Proportional to 22,815.10, 31,482.78 and 12,742.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,815.10 : 31,482.78 = 12,742.14 : x
2. Step 2: Convert to fraction form
   22,815.10/31,482.78 = 12,742.14/x
3. Step 3: Cross multiply
   22,815.10x = 31,482.78 × 12,742.14
4. Step 4: Simplify right side
   22,815.10x = 401,157,990.35
5. Step 5: Solve for x
   x = 401,157,990.35/22,815.10
6. Step 6: Final answer
   x = 17,583.01