Finding the Fourth Proportional to 139,478.82, 209,100.33 and 60,533.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,478.82 : 209,100.33 = 60,533.70 : x
2. Step 2: Convert to fraction form
   139,478.82/209,100.33 = 60,533.70/x
3. Step 3: Cross multiply
   139,478.82x = 209,100.33 × 60,533.70
4. Step 4: Simplify right side
   139,478.82x = 12,657,616,646.12
5. Step 5: Solve for x
   x = 12,657,616,646.12/139,478.82
6. Step 6: Final answer
   x = 90,749.38