Finding the Fourth Proportional to 171,242.15, 236,361.69 and 99,636.03

Step by Step Solution

1. Step 1: Write the proportion equation
   171,242.15 : 236,361.69 = 99,636.03 : x
2. Step 2: Convert to fraction form
   171,242.15/236,361.69 = 99,636.03/x
3. Step 3: Cross multiply
   171,242.15x = 236,361.69 × 99,636.03
4. Step 4: Simplify right side
   171,242.15x = 23,550,140,435.69
5. Step 5: Solve for x
   x = 23,550,140,435.69/171,242.15
6. Step 6: Final answer
   x = 137,525.38