Finding the Fourth Proportional to 300,116, 450,178.32 and 78,500

Step by Step Solution

1. Step 1: Write the proportion equation
   300,116 : 450,178.32 = 78,500 : x
2. Step 2: Convert to fraction form
   300,116/450,178.32 = 78,500/x
3. Step 3: Cross multiply
   300,116x = 450,178.32 × 78,500
4. Step 4: Simplify right side
   300,116x = 35,338,998,120
5. Step 5: Solve for x
   x = 35,338,998,120/300,116
6. Step 6: Final answer
   x = 117,751.13