Finding the Fourth Proportional to 139,431, 192,409.52 and 75,767.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,431 : 192,409.52 = 75,767.43 : x
2. Step 2: Convert to fraction form
   139,431/192,409.52 = 75,767.43/x
3. Step 3: Cross multiply
   139,431x = 192,409.52 × 75,767.43
4. Step 4: Simplify right side
   139,431x = 14,578,374,459.10
5. Step 5: Solve for x
   x = 14,578,374,459.10/139,431
6. Step 6: Final answer
   x = 104,556.19