Finding the Fourth Proportional to 86,016.57, 129,042.80 and 43,345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   86,016.57 : 129,042.80 = 43,345.98 : x
2. Step 2: Convert to fraction form
   86,016.57/129,042.80 = 43,345.98/x
3. Step 3: Cross multiply
   86,016.57x = 129,042.80 × 43,345.98
4. Step 4: Simplify right side
   86,016.57x = 5,593,486,627.94
5. Step 5: Solve for x
   x = 5,593,486,627.94/86,016.57
6. Step 6: Final answer
   x = 65,028.01