Finding the Fourth Proportional to 172,665.50, 259,035.30 and 97,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,665.50 : 259,035.30 = 97,821.50 : x
2. Step 2: Convert to fraction form
   172,665.50/259,035.30 = 97,821.50/x
3. Step 3: Cross multiply
   172,665.50x = 259,035.30 × 97,821.50
4. Step 4: Simplify right side
   172,665.50x = 25,339,220,303.77
5. Step 5: Solve for x
   x = 25,339,220,303.77/172,665.50
6. Step 6: Final answer
   x = 146,753.24