Finding the Fourth Proportional to 78,680.78, 118,022.01 and 62,985.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.78 : 118,022.01 = 62,985.60 : x
2. Step 2: Convert to fraction form
   78,680.78/118,022.01 = 62,985.60/x
3. Step 3: Cross multiply
   78,680.78x = 118,022.01 × 62,985.60
4. Step 4: Simplify right side
   78,680.78x = 7,433,686,876.86
5. Step 5: Solve for x
   x = 7,433,686,876.86/78,680.78
6. Step 6: Final answer
   x = 94,479.07