Finding the Fourth Proportional to 139,300.32, 192,229.12 and 75,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,300.32 : 192,229.12 = 75,636.72 : x
2. Step 2: Convert to fraction form
   139,300.32/192,229.12 = 75,636.72/x
3. Step 3: Cross multiply
   139,300.32x = 192,229.12 × 75,636.72
4. Step 4: Simplify right side
   139,300.32x = 14,539,580,125.29
5. Step 5: Solve for x
   x = 14,539,580,125.29/139,300.32
6. Step 6: Final answer
   x = 104,375.78