Finding the Fourth Proportional to 134,976.50, 186,267.59 and 78,391.52

Step by Step Solution

1. Step 1: Write the proportion equation
   134,976.50 : 186,267.59 = 78,391.52 : x
2. Step 2: Convert to fraction form
   134,976.50/186,267.59 = 78,391.52/x
3. Step 3: Cross multiply
   134,976.50x = 186,267.59 × 78,391.52
4. Step 4: Simplify right side
   134,976.50x = 14,601,799,114.88
5. Step 5: Solve for x
   x = 14,601,799,114.88/134,976.50
6. Step 6: Final answer
   x = 108,180.31