Finding the Fourth Proportional to 91,245.82, 136,873.59 and 28,921.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91,245.82 : 136,873.59 = 28,921.18 : x
2. Step 2: Convert to fraction form
   91,245.82/136,873.59 = 28,921.18/x
3. Step 3: Cross multiply
   91,245.82x = 136,873.59 × 28,921.18
4. Step 4: Simplify right side
   91,245.82x = 3,958,545,733.64
5. Step 5: Solve for x
   x = 3,958,545,733.64/91,245.82
6. Step 6: Final answer
   x = 43,383.31