Finding the Fourth Proportional to 22,783.50, 31,442.45 and 13,355.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,783.50 : 31,442.45 = 13,355.10 : x
2. Step 2: Convert to fraction form
   22,783.50/31,442.45 = 13,355.10/x
3. Step 3: Cross multiply
   22,783.50x = 31,442.45 × 13,355.10
4. Step 4: Simplify right side
   22,783.50x = 419,916,997.22
5. Step 5: Solve for x
   x = 419,916,997.22/22,783.50
6. Step 6: Final answer
   x = 18,430.75