Finding the Fourth Proportional to 116,108.99, 160,279.40 and 78,434.27

Step by Step Solution

1. Step 1: Write the proportion equation
   116,108.99 : 160,279.40 = 78,434.27 : x
2. Step 2: Convert to fraction form
   116,108.99/160,279.40 = 78,434.27/x
3. Step 3: Cross multiply
   116,108.99x = 160,279.40 × 78,434.27
4. Step 4: Simplify right side
   116,108.99x = 12,571,397,735.04
5. Step 5: Solve for x
   x = 12,571,397,735.04/116,108.99
6. Step 6: Final answer
   x = 108,272.39