Finding the Fourth Proportional to 91,499.32, 136,626.16 and 80,735.98

Step by Step Solution

1. Step 1: Write the proportion equation
   91,499.32 : 136,626.16 = 80,735.98 : x
2. Step 2: Convert to fraction form
   91,499.32/136,626.16 = 80,735.98/x
3. Step 3: Cross multiply
   91,499.32x = 136,626.16 × 80,735.98
4. Step 4: Simplify right side
   91,499.32x = 11,030,645,834.43
5. Step 5: Solve for x
   x = 11,030,645,834.43/91,499.32
6. Step 6: Final answer
   x = 120,554.40