Finding the Fourth Proportional to 78,896.63, 117,650.07 and 78,185.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,896.63 : 117,650.07 = 78,185.86 : x
2. Step 2: Convert to fraction form
   78,896.63/117,650.07 = 78,185.86/x
3. Step 3: Cross multiply
   78,896.63x = 117,650.07 × 78,185.86
4. Step 4: Simplify right side
   78,896.63x = 9,198,571,607.89
5. Step 5: Solve for x
   x = 9,198,571,607.89/78,896.63
6. Step 6: Final answer
   x = 116,590.17