Finding the Fourth Proportional to 91,282.31, 136,936.52 and 28,107.77

Step by Step Solution

1. Step 1: Write the proportion equation
   91,282.31 : 136,936.52 = 28,107.77 : x
2. Step 2: Convert to fraction form
   91,282.31/136,936.52 = 28,107.77/x
3. Step 3: Cross multiply
   91,282.31x = 136,936.52 × 28,107.77
4. Step 4: Simplify right side
   91,282.31x = 3,848,980,068.22
5. Step 5: Solve for x
   x = 3,848,980,068.22/91,282.31
6. Step 6: Final answer
   x = 42,165.68