Finding the Fourth Proportional to 217,667.45, 326,627.24 and 91,296.45

Step by Step Solution

1. Step 1: Write the proportion equation
   217,667.45 : 326,627.24 = 91,296.45 : x
2. Step 2: Convert to fraction form
   217,667.45/326,627.24 = 91,296.45/x
3. Step 3: Cross multiply
   217,667.45x = 326,627.24 × 91,296.45
4. Step 4: Simplify right side
   217,667.45x = 29,819,907,028.82
5. Step 5: Solve for x
   x = 29,819,907,028.82/217,667.45
6. Step 6: Final answer
   x = 136,997.55