Finding the Fourth Proportional to 139,345.34, 192,297.12 and 75,684.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,345.34 : 192,297.12 = 75,684.20 : x
2. Step 2: Convert to fraction form
   139,345.34/192,297.12 = 75,684.20/x
3. Step 3: Cross multiply
   139,345.34x = 192,297.12 × 75,684.20
4. Step 4: Simplify right side
   139,345.34x = 14,553,853,689.50
5. Step 5: Solve for x
   x = 14,553,853,689.50/139,345.34
6. Step 6: Final answer
   x = 104,444.50