Finding the Fourth Proportional to 139,805.37, 192,933.63 and 79,374.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,805.37 : 192,933.63 = 79,374.78 : x
2. Step 2: Convert to fraction form
   139,805.37/192,933.63 = 79,374.78/x
3. Step 3: Cross multiply
   139,805.37x = 192,933.63 × 79,374.78
4. Step 4: Simplify right side
   139,805.37x = 15,314,064,435.85
5. Step 5: Solve for x
   x = 15,314,064,435.85/139,805.37
6. Step 6: Final answer
   x = 109,538.46