Finding the Fourth Proportional to 139,585.61, 192,525 and 88,554.39

Step by Step Solution

1. Step 1: Write the proportion equation
   139,585.61 : 192,525 = 88,554.39 : x
2. Step 2: Convert to fraction form
   139,585.61/192,525 = 88,554.39/x
3. Step 3: Cross multiply
   139,585.61x = 192,525 × 88,554.39
4. Step 4: Simplify right side
   139,585.61x = 17,048,933,934.75
5. Step 5: Solve for x
   x = 17,048,933,934.75/139,585.61
6. Step 6: Final answer
   x = 122,139.63