Finding the Fourth Proportional to 91,013.10, 136,428.93 and 43,540.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,013.10 : 136,428.93 = 43,540.62 : x
2. Step 2: Convert to fraction form
   91,013.10/136,428.93 = 43,540.62/x
3. Step 3: Cross multiply
   91,013.10x = 136,428.93 × 43,540.62
4. Step 4: Simplify right side
   91,013.10x = 5,940,200,198.14
5. Step 5: Solve for x
   x = 5,940,200,198.14/91,013.10
6. Step 6: Final answer
   x = 65,267.53