Finding the Fourth Proportional to 78,680.35, 118,020.12 and 45,378.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.35 : 118,020.12 = 45,378.82 : x
2. Step 2: Convert to fraction form
   78,680.35/118,020.12 = 45,378.82/x
3. Step 3: Cross multiply
   78,680.35x = 118,020.12 × 45,378.82
4. Step 4: Simplify right side
   78,680.35x = 5,355,613,781.86
5. Step 5: Solve for x
   x = 5,355,613,781.86/78,680.35
6. Step 6: Final answer
   x = 68,068.00