Finding the Fourth Proportional to 139,509.82, 192,589.68 and 89,237.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,509.82 : 192,589.68 = 89,237.98 : x
2. Step 2: Convert to fraction form
   139,509.82/192,589.68 = 89,237.98/x
3. Step 3: Cross multiply
   139,509.82x = 192,589.68 × 89,237.98
4. Step 4: Simplify right side
   139,509.82x = 17,186,314,012.05
5. Step 5: Solve for x
   x = 17,186,314,012.05/139,509.82
6. Step 6: Final answer
   x = 123,190.71