Finding the Fourth Proportional to 139,718.06, 209,459.52 and 60,772.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,718.06 : 209,459.52 = 60,772.83 : x
2. Step 2: Convert to fraction form
   139,718.06/209,459.52 = 60,772.83/x
3. Step 3: Cross multiply
   139,718.06x = 209,459.52 × 60,772.83
4. Step 4: Simplify right side
   139,718.06x = 12,729,447,800.84
5. Step 5: Solve for x
   x = 12,729,447,800.84/139,718.06
6. Step 6: Final answer
   x = 91,108.11