Finding the Fourth Proportional to 139,496.57, 209,271.79 and 59,533.37

Step by Step Solution

1. Step 1: Write the proportion equation
   139,496.57 : 209,271.79 = 59,533.37 : x
2. Step 2: Convert to fraction form
   139,496.57/209,271.79 = 59,533.37/x
3. Step 3: Cross multiply
   139,496.57x = 209,271.79 × 59,533.37
4. Step 4: Simplify right side
   139,496.57x = 12,458,654,904.63
5. Step 5: Solve for x
   x = 12,458,654,904.63/139,496.57
6. Step 6: Final answer
   x = 89,311.55