Finding the Fourth Proportional to 78,420.35, 117,601.82 and 33,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,420.35 : 117,601.82 = 33,436.50 : x
2. Step 2: Convert to fraction form
   78,420.35/117,601.82 = 33,436.50/x
3. Step 3: Cross multiply
   78,420.35x = 117,601.82 × 33,436.50
4. Step 4: Simplify right side
   78,420.35x = 3,932,192,959.71
5. Step 5: Solve for x
   x = 3,932,192,959.71/78,420.35
6. Step 6: Final answer
   x = 50,142.51