Finding the Fourth Proportional to 139,662.30, 192,830.40 and 130,739.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,662.30 : 192,830.40 = 130,739.34 : x
2. Step 2: Convert to fraction form
   139,662.30/192,830.40 = 130,739.34/x
3. Step 3: Cross multiply
   139,662.30x = 192,830.40 × 130,739.34
4. Step 4: Simplify right side
   139,662.30x = 25,210,519,227.94
5. Step 5: Solve for x
   x = 25,210,519,227.94/139,662.30
6. Step 6: Final answer
   x = 180,510.55