Finding the Fourth Proportional to 86,544.34, 129,553.47 and 55,401.46

Step by Step Solution

1. Step 1: Write the proportion equation
   86,544.34 : 129,553.47 = 55,401.46 : x
2. Step 2: Convert to fraction form
   86,544.34/129,553.47 = 55,401.46/x
3. Step 3: Cross multiply
   86,544.34x = 129,553.47 × 55,401.46
4. Step 4: Simplify right side
   86,544.34x = 7,177,451,386.07
5. Step 5: Solve for x
   x = 7,177,451,386.07/86,544.34
6. Step 6: Final answer
   x = 82,933.80