Finding the Fourth Proportional to 139,052.37, 191,896.04 and 78,632.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,052.37 : 191,896.04 = 78,632.05 : x
2. Step 2: Convert to fraction form
   139,052.37/191,896.04 = 78,632.05/x
3. Step 3: Cross multiply
   139,052.37x = 191,896.04 × 78,632.05
4. Step 4: Simplify right side
   139,052.37x = 15,089,179,012.08
5. Step 5: Solve for x
   x = 15,089,179,012.08/139,052.37
6. Step 6: Final answer
   x = 108,514.36