Finding the Fourth Proportional to 139,443.39, 209,127.56 and 60,539.13

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.39 : 209,127.56 = 60,539.13 : x
2. Step 2: Convert to fraction form
   139,443.39/209,127.56 = 60,539.13/x
3. Step 3: Cross multiply
   139,443.39x = 209,127.56 × 60,539.13
4. Step 4: Simplify right side
   139,443.39x = 12,660,400,238.73
5. Step 5: Solve for x
   x = 12,660,400,238.73/139,443.39
6. Step 6: Final answer
   x = 90,792.40