Finding the Fourth Proportional to 91,166.10, 136,578.28 and 53,613.94

Step by Step Solution

1. Step 1: Write the proportion equation
   91,166.10 : 136,578.28 = 53,613.94 : x
2. Step 2: Convert to fraction form
   91,166.10/136,578.28 = 53,613.94/x
3. Step 3: Cross multiply
   91,166.10x = 136,578.28 × 53,613.94
4. Step 4: Simplify right side
   91,166.10x = 7,322,499,709.22
5. Step 5: Solve for x
   x = 7,322,499,709.22/91,166.10
6. Step 6: Final answer
   x = 80,320.42