Finding the Fourth Proportional to 139,601.31, 192,546.69 and 88,570.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,601.31 : 192,546.69 = 88,570.10 : x
2. Step 2: Convert to fraction form
   139,601.31/192,546.69 = 88,570.10/x
3. Step 3: Cross multiply
   139,601.31x = 192,546.69 × 88,570.10
4. Step 4: Simplify right side
   139,601.31x = 17,053,878,625.24
5. Step 5: Solve for x
   x = 17,053,878,625.24/139,601.31
6. Step 6: Final answer
   x = 122,161.31