Finding the Fourth Proportional to 139,710.23, 209,447.79 and 60,765

Step by Step Solution

1. Step 1: Write the proportion equation
   139,710.23 : 209,447.79 = 60,765 : x
2. Step 2: Convert to fraction form
   139,710.23/209,447.79 = 60,765/x
3. Step 3: Cross multiply
   139,710.23x = 209,447.79 × 60,765
4. Step 4: Simplify right side
   139,710.23x = 12,727,094,959.35
5. Step 5: Solve for x
   x = 12,727,094,959.35/139,710.23
6. Step 6: Final answer
   x = 91,096.37