Finding the Fourth Proportional to 49,989.60, 68,992.70 and 30,620.07

Step by Step Solution

1. Step 1: Write the proportion equation
   49,989.60 : 68,992.70 = 30,620.07 : x
2. Step 2: Convert to fraction form
   49,989.60/68,992.70 = 30,620.07/x
3. Step 3: Cross multiply
   49,989.60x = 68,992.70 × 30,620.07
4. Step 4: Simplify right side
   49,989.60x = 2,112,561,150.39
5. Step 5: Solve for x
   x = 2,112,561,150.39/49,989.60
6. Step 6: Final answer
   x = 42,260.01