Finding the Fourth Proportional to 245,983.89, 369,083.06 and 86,174.47

Step by Step Solution

1. Step 1: Write the proportion equation
   245,983.89 : 369,083.06 = 86,174.47 : x
2. Step 2: Convert to fraction form
   245,983.89/369,083.06 = 86,174.47/x
3. Step 3: Cross multiply
   245,983.89x = 369,083.06 × 86,174.47
4. Step 4: Simplify right side
   245,983.89x = 31,805,537,111.96
5. Step 5: Solve for x
   x = 31,805,537,111.96/245,983.89
6. Step 6: Final answer
   x = 129,299.27