Finding the Fourth Proportional to 139,331.58, 192,279.83 and 78,900.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,331.58 : 192,279.83 = 78,900.62 : x
2. Step 2: Convert to fraction form
   139,331.58/192,279.83 = 78,900.62/x
3. Step 3: Cross multiply
   139,331.58x = 192,279.83 × 78,900.62
4. Step 4: Simplify right side
   139,331.58x = 15,170,996,444.59
5. Step 5: Solve for x
   x = 15,170,996,444.59/139,331.58
6. Step 6: Final answer
   x = 108,884.12