Finding the Fourth Proportional to 139,161.72, 191,956.86 and 122,152.53

Step by Step Solution

1. Step 1: Write the proportion equation
   139,161.72 : 191,956.86 = 122,152.53 : x
2. Step 2: Convert to fraction form
   139,161.72/191,956.86 = 122,152.53/x
3. Step 3: Cross multiply
   139,161.72x = 191,956.86 × 122,152.53
4. Step 4: Simplify right side
   139,161.72x = 23,448,016,099.86
5. Step 5: Solve for x
   x = 23,448,016,099.86/139,161.72
6. Step 6: Final answer
   x = 168,494.73