Finding the Fourth Proportional to 139,153.84, 192,052.91 and 88,171.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,153.84 : 192,052.91 = 88,171.31 : x
2. Step 2: Convert to fraction form
   139,153.84/192,052.91 = 88,171.31/x
3. Step 3: Cross multiply
   139,153.84x = 192,052.91 × 88,171.31
4. Step 4: Simplify right side
   139,153.84x = 16,933,556,700.43
5. Step 5: Solve for x
   x = 16,933,556,700.43/139,153.84
6. Step 6: Final answer
   x = 121,689.47