Finding the Fourth Proportional to 220,109.73, 330,111.43 and 91,956.76

Step by Step Solution

1. Step 1: Write the proportion equation
   220,109.73 : 330,111.43 = 91,956.76 : x
2. Step 2: Convert to fraction form
   220,109.73/330,111.43 = 91,956.76/x
3. Step 3: Cross multiply
   220,109.73x = 330,111.43 × 91,956.76
4. Step 4: Simplify right side
   220,109.73x = 30,355,976,486.60
5. Step 5: Solve for x
   x = 30,355,976,486.60/220,109.73
6. Step 6: Final answer
   x = 137,912.93