Finding the Fourth Proportional to 80,905.98, 121,360.00 and 30,989.07

Step by Step Solution

1. Step 1: Write the proportion equation
   80,905.98 : 121,360.00 = 30,989.07 : x
2. Step 2: Convert to fraction form
   80,905.98/121,360.00 = 30,989.07/x
3. Step 3: Cross multiply
   80,905.98x = 121,360.00 × 30,989.07
4. Step 4: Simplify right side
   80,905.98x = 3,760,833,258.01
5. Step 5: Solve for x
   x = 3,760,833,258.01/80,905.98
6. Step 6: Final answer
   x = 46,484.00