Finding the Fourth Proportional to 158,628, 218,906.64 and 91,560

Step by Step Solution

1. Step 1: Write the proportion equation
   158,628 : 218,906.64 = 91,560 : x
2. Step 2: Convert to fraction form
   158,628/218,906.64 = 91,560/x
3. Step 3: Cross multiply
   158,628x = 218,906.64 × 91,560
4. Step 4: Simplify right side
   158,628x = 20,043,091,958.40
5. Step 5: Solve for x
   x = 20,043,091,958.40/158,628
6. Step 6: Final answer
   x = 126,352.80