Finding the Fourth Proportional to 22,465.59, 31,004.55 and 12,906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,465.59 : 31,004.55 = 12,906.78 : x
2. Step 2: Convert to fraction form
   22,465.59/31,004.55 = 12,906.78/x
3. Step 3: Cross multiply
   22,465.59x = 31,004.55 × 12,906.78
4. Step 4: Simplify right side
   22,465.59x = 400,168,905.85
5. Step 5: Solve for x
   x = 400,168,905.85/22,465.59
6. Step 6: Final answer
   x = 17,812.53