Finding the Fourth Proportional to 300,069, 450,107.82 and 78,453

Step by Step Solution

1. Step 1: Write the proportion equation
   300,069 : 450,107.82 = 78,453 : x
2. Step 2: Convert to fraction form
   300,069/450,107.82 = 78,453/x
3. Step 3: Cross multiply
   300,069x = 450,107.82 × 78,453
4. Step 4: Simplify right side
   300,069x = 35,312,308,802.46
5. Step 5: Solve for x
   x = 35,312,308,802.46/300,069
6. Step 6: Final answer
   x = 117,680.63