Finding the Fourth Proportional to 78,103.66, 117,131.24 and 28,177.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,103.66 : 117,131.24 = 28,177.25 : x
2. Step 2: Convert to fraction form
   78,103.66/117,131.24 = 28,177.25/x
3. Step 3: Cross multiply
   78,103.66x = 117,131.24 × 28,177.25
4. Step 4: Simplify right side
   78,103.66x = 3,300,436,209.15
5. Step 5: Solve for x
   x = 3,300,436,209.15/78,103.66
6. Step 6: Final answer
   x = 42,257.13