Finding the Fourth Proportional to 254,869.47, 382,065.39 and 86,271.89

Step by Step Solution

1. Step 1: Write the proportion equation
   254,869.47 : 382,065.39 = 86,271.89 : x
2. Step 2: Convert to fraction form
   254,869.47/382,065.39 = 86,271.89/x
3. Step 3: Cross multiply
   254,869.47x = 382,065.39 × 86,271.89
4. Step 4: Simplify right side
   254,869.47x = 32,961,501,388.56
5. Step 5: Solve for x
   x = 32,961,501,388.56/254,869.47
6. Step 6: Final answer
   x = 129,326.99