Finding the Fourth Proportional to 139,722.34, 192,389.82 and 105,317.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,722.34 : 192,389.82 = 105,317.04 : x
2. Step 2: Convert to fraction form
   139,722.34/192,389.82 = 105,317.04/x
3. Step 3: Cross multiply
   139,722.34x = 192,389.82 × 105,317.04
4. Step 4: Simplify right side
   139,722.34x = 20,261,926,368.53
5. Step 5: Solve for x
   x = 20,261,926,368.53/139,722.34
6. Step 6: Final answer
   x = 145,015.65