Finding the Fourth Proportional to 91,499.82, 136,626.90 and 80,736.48

Step by Step Solution

1. Step 1: Write the proportion equation
   91,499.82 : 136,626.90 = 80,736.48 : x
2. Step 2: Convert to fraction form
   91,499.82/136,626.90 = 80,736.48/x
3. Step 3: Cross multiply
   91,499.82x = 136,626.90 × 80,736.48
4. Step 4: Simplify right side
   91,499.82x = 11,030,774,296.18
5. Step 5: Solve for x
   x = 11,030,774,296.18/91,499.82
6. Step 6: Final answer
   x = 120,555.15