Finding the Fourth Proportional to 78,738.48, 118,140.12 and 43,636.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,738.48 : 118,140.12 = 43,636.32 : x
2. Step 2: Convert to fraction form
   78,738.48/118,140.12 = 43,636.32/x
3. Step 3: Cross multiply
   78,738.48x = 118,140.12 × 43,636.32
4. Step 4: Simplify right side
   78,738.48x = 5,155,200,081.16
5. Step 5: Solve for x
   x = 5,155,200,081.16/78,738.48
6. Step 6: Final answer
   x = 65,472.44