Finding the Fourth Proportional to 78,436.49, 117,625.10 and 28,504.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,436.49 : 117,625.10 = 28,504.17 : x
2. Step 2: Convert to fraction form
   78,436.49/117,625.10 = 28,504.17/x
3. Step 3: Cross multiply
   78,436.49x = 117,625.10 × 28,504.17
4. Step 4: Simplify right side
   78,436.49x = 3,352,805,704.15
5. Step 5: Solve for x
   x = 3,352,805,704.15/78,436.49
6. Step 6: Final answer
   x = 42,745.49