Finding the Fourth Proportional to 21,760.86, 30,035.43 and 13,372.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.86 : 30,035.43 = 13,372.50 : x
2. Step 2: Convert to fraction form
   21,760.86/30,035.43 = 13,372.50/x
3. Step 3: Cross multiply
   21,760.86x = 30,035.43 × 13,372.50
4. Step 4: Simplify right side
   21,760.86x = 401,648,787.68
5. Step 5: Solve for x
   x = 401,648,787.68/21,760.86
6. Step 6: Final answer
   x = 18,457.39