Finding the Fourth Proportional to 171,036.54, 236,012.13 and 99,401.58

Step by Step Solution

1. Step 1: Write the proportion equation
   171,036.54 : 236,012.13 = 99,401.58 : x
2. Step 2: Convert to fraction form
   171,036.54/236,012.13 = 99,401.58/x
3. Step 3: Cross multiply
   171,036.54x = 236,012.13 × 99,401.58
4. Step 4: Simplify right side
   171,036.54x = 23,459,978,621.17
5. Step 5: Solve for x
   x = 23,459,978,621.17/171,036.54
6. Step 6: Final answer
   x = 137,163.55