Finding the Fourth Proportional to 108,085.35, 162,374.06 and 78,191.80

Step by Step Solution

1. Step 1: Write the proportion equation
   108,085.35 : 162,374.06 = 78,191.80 : x
2. Step 2: Convert to fraction form
   108,085.35/162,374.06 = 78,191.80/x
3. Step 3: Cross multiply
   108,085.35x = 162,374.06 × 78,191.80
4. Step 4: Simplify right side
   108,085.35x = 12,696,319,814.25
5. Step 5: Solve for x
   x = 12,696,319,814.25/108,085.35
6. Step 6: Final answer
   x = 117,465.68