Finding the Fourth Proportional to 80,774.56, 111,196.56 and 66,604.96

Step by Step Solution

1. Step 1: Write the proportion equation
   80,774.56 : 111,196.56 = 66,604.96 : x
2. Step 2: Convert to fraction form
   80,774.56/111,196.56 = 66,604.96/x
3. Step 3: Cross multiply
   80,774.56x = 111,196.56 × 66,604.96
4. Step 4: Simplify right side
   80,774.56x = 7,406,242,430.94
5. Step 5: Solve for x
   x = 7,406,242,430.94/80,774.56
6. Step 6: Final answer
   x = 91,690.29