Finding the Fourth Proportional to 78,131.27, 117,196.05 and 18,966.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.27 : 117,196.05 = 18,966.94 : x
2. Step 2: Convert to fraction form
   78,131.27/117,196.05 = 18,966.94/x
3. Step 3: Cross multiply
   78,131.27x = 117,196.05 × 18,966.94
4. Step 4: Simplify right side
   78,131.27x = 2,222,850,666.21
5. Step 5: Solve for x
   x = 2,222,850,666.21/78,131.27
6. Step 6: Final answer
   x = 28,450.20