Finding the Fourth Proportional to 139,288.28, 192,212.56 and 75,624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,288.28 : 192,212.56 = 75,624.72 : x
2. Step 2: Convert to fraction form
   139,288.28/192,212.56 = 75,624.72/x
3. Step 3: Cross multiply
   139,288.28x = 192,212.56 × 75,624.72
4. Step 4: Simplify right side
   139,288.28x = 14,536,021,030.48
5. Step 5: Solve for x
   x = 14,536,021,030.48/139,288.28
6. Step 6: Final answer
   x = 104,359.25