Finding the Fourth Proportional to 78,101.49, 117,153.68 and 28,185.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,101.49 : 117,153.68 = 28,185.33 : x
2. Step 2: Convert to fraction form
   78,101.49/117,153.68 = 28,185.33/x
3. Step 3: Cross multiply
   78,101.49x = 117,153.68 × 28,185.33
4. Step 4: Simplify right side
   78,101.49x = 3,302,014,990.59
5. Step 5: Solve for x
   x = 3,302,014,990.59/78,101.49
6. Step 6: Final answer
   x = 42,278.51