Finding the Fourth Proportional to 78,096.89, 117,144.29 and 18,933.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,096.89 : 117,144.29 = 18,933.09 : x
2. Step 2: Convert to fraction form
   78,096.89/117,144.29 = 18,933.09/x
3. Step 3: Cross multiply
   78,096.89x = 117,144.29 × 18,933.09
4. Step 4: Simplify right side
   78,096.89x = 2,217,903,432.89
5. Step 5: Solve for x
   x = 2,217,903,432.89/78,096.89
6. Step 6: Final answer
   x = 28,399.38