Finding the Fourth Proportional to 139,722.21, 209,581.25 and 34,541.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,722.21 : 209,581.25 = 34,541.15 : x
2. Step 2: Convert to fraction form
   139,722.21/209,581.25 = 34,541.15/x
3. Step 3: Cross multiply
   139,722.21x = 209,581.25 × 34,541.15
4. Step 4: Simplify right side
   139,722.21x = 7,239,176,172.83
5. Step 5: Solve for x
   x = 7,239,176,172.83/139,722.21
6. Step 6: Final answer
   x = 51,811.21