Finding the Fourth Proportional to 158,644, 218,928.72 and 91,576

Step by Step Solution

1. Step 1: Write the proportion equation
   158,644 : 218,928.72 = 91,576 : x
2. Step 2: Convert to fraction form
   158,644/218,928.72 = 91,576/x
3. Step 3: Cross multiply
   158,644x = 218,928.72 × 91,576
4. Step 4: Simplify right side
   158,644x = 20,048,616,462.72
5. Step 5: Solve for x
   x = 20,048,616,462.72/158,644
6. Step 6: Final answer
   x = 126,374.88