Finding the Fourth Proportional to 139,096.48, 191,950.68 and 78,665.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,096.48 : 191,950.68 = 78,665.08 : x
2. Step 2: Convert to fraction form
   139,096.48/191,950.68 = 78,665.08/x
3. Step 3: Cross multiply
   139,096.48x = 191,950.68 × 78,665.08
4. Step 4: Simplify right side
   139,096.48x = 15,099,815,598.25
5. Step 5: Solve for x
   x = 15,099,815,598.25/139,096.48
6. Step 6: Final answer
   x = 108,556.42