Finding the Fourth Proportional to 139,155.84, 191,949.62 and 122,971.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,155.84 : 191,949.62 = 122,971.23 : x
2. Step 2: Convert to fraction form
   139,155.84/191,949.62 = 122,971.23/x
3. Step 3: Cross multiply
   139,155.84x = 191,949.62 × 122,971.23
4. Step 4: Simplify right side
   139,155.84x = 23,604,280,254.58
5. Step 5: Solve for x
   x = 23,604,280,254.58/139,155.84
6. Step 6: Final answer
   x = 169,624.79