Finding the Fourth Proportional to 146,799.72, 202,536.25 and 86,385.21

Step by Step Solution

1. Step 1: Write the proportion equation
   146,799.72 : 202,536.25 = 86,385.21 : x
2. Step 2: Convert to fraction form
   146,799.72/202,536.25 = 86,385.21/x
3. Step 3: Cross multiply
   146,799.72x = 202,536.25 × 86,385.21
4. Step 4: Simplify right side
   146,799.72x = 17,496,136,083.02
5. Step 5: Solve for x
   x = 17,496,136,083.02/146,799.72
6. Step 6: Final answer
   x = 119,183.72