Finding the Fourth Proportional to 139,114.37, 191,982.18 and 78,683.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,114.37 : 191,982.18 = 78,683.84 : x
2. Step 2: Convert to fraction form
   139,114.37/191,982.18 = 78,683.84/x
3. Step 3: Cross multiply
   139,114.37x = 191,982.18 × 78,683.84
4. Step 4: Simplify right side
   139,114.37x = 15,105,893,780.64
5. Step 5: Solve for x
   x = 15,105,893,780.64/139,114.37
6. Step 6: Final answer
   x = 108,586.15