Finding the Fourth Proportional to 78,171.52, 117,256.42 and 19,007.23

Step by Step Solution

1. Step 1: Write the proportion equation
   78,171.52 : 117,256.42 = 19,007.23 : x
2. Step 2: Convert to fraction form
   78,171.52/117,256.42 = 19,007.23/x
3. Step 3: Cross multiply
   78,171.52x = 117,256.42 × 19,007.23
4. Step 4: Simplify right side
   78,171.52x = 2,228,719,062.60
5. Step 5: Solve for x
   x = 2,228,719,062.60/78,171.52
6. Step 6: Final answer
   x = 28,510.63