Finding the Fourth Proportional to 139,554.40, 209,380.20 and 60,725.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,554.40 : 209,380.20 = 60,725.20 : x
2. Step 2: Convert to fraction form
   139,554.40/209,380.20 = 60,725.20/x
3. Step 3: Cross multiply
   139,554.40x = 209,380.20 × 60,725.20
4. Step 4: Simplify right side
   139,554.40x = 12,714,654,521.04
5. Step 5: Solve for x
   x = 12,714,654,521.04/139,554.40
6. Step 6: Final answer
   x = 91,108.95