Finding the Fourth Proportional to 172,216.78, 237,643.41 and 99,601.09

Step by Step Solution

1. Step 1: Write the proportion equation
   172,216.78 : 237,643.41 = 99,601.09 : x
2. Step 2: Convert to fraction form
   172,216.78/237,643.41 = 99,601.09/x
3. Step 3: Cross multiply
   172,216.78x = 237,643.41 × 99,601.09
4. Step 4: Simplify right side
   172,216.78x = 23,669,542,667.32
5. Step 5: Solve for x
   x = 23,669,542,667.32/172,216.78
6. Step 6: Final answer
   x = 137,440.40