Finding the Fourth Proportional to 139,325.40, 192,259.98 and 89,019

Step by Step Solution

1. Step 1: Write the proportion equation
   139,325.40 : 192,259.98 = 89,019 : x
2. Step 2: Convert to fraction form
   139,325.40/192,259.98 = 89,019/x
3. Step 3: Cross multiply
   139,325.40x = 192,259.98 × 89,019
4. Step 4: Simplify right side
   139,325.40x = 17,114,791,159.62
5. Step 5: Solve for x
   x = 17,114,791,159.62/139,325.40
6. Step 6: Final answer
   x = 122,840.42