Finding the Fourth Proportional to 49,792.12, 69,190.38 and 49,280.10

Step by Step Solution

1. Step 1: Write the proportion equation
   49,792.12 : 69,190.38 = 49,280.10 : x
2. Step 2: Convert to fraction form
   49,792.12/69,190.38 = 49,280.10/x
3. Step 3: Cross multiply
   49,792.12x = 69,190.38 × 49,280.10
4. Step 4: Simplify right side
   49,792.12x = 3,409,708,447.37
5. Step 5: Solve for x
   x = 3,409,708,447.37/49,792.12
6. Step 6: Final answer
   x = 68,478.88