Finding the Fourth Proportional to 139,285.36, 208,937.76 and 60,404.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,285.36 : 208,937.76 = 60,404.32 : x
2. Step 2: Convert to fraction form
   139,285.36/208,937.76 = 60,404.32/x
3. Step 3: Cross multiply
   139,285.36x = 208,937.76 × 60,404.32
4. Step 4: Simplify right side
   139,285.36x = 12,620,743,315.12
5. Step 5: Solve for x
   x = 12,620,743,315.12/139,285.36
6. Step 6: Final answer
   x = 90,610.70