Finding the Fourth Proportional to 116,345.30, 160,571.49 and 78,617.30

Step by Step Solution

1. Step 1: Write the proportion equation
   116,345.30 : 160,571.49 = 78,617.30 : x
2. Step 2: Convert to fraction form
   116,345.30/160,571.49 = 78,617.30/x
3. Step 3: Cross multiply
   116,345.30x = 160,571.49 × 78,617.30
4. Step 4: Simplify right side
   116,345.30x = 12,623,697,000.78
5. Step 5: Solve for x
   x = 12,623,697,000.78/116,345.30
6. Step 6: Final answer
   x = 108,501.99