Finding the Fourth Proportional to 86,081.39, 128,882.58 and 43,870.46

Step by Step Solution

1. Step 1: Write the proportion equation
   86,081.39 : 128,882.58 = 43,870.46 : x
2. Step 2: Convert to fraction form
   86,081.39/128,882.58 = 43,870.46/x
3. Step 3: Cross multiply
   86,081.39x = 128,882.58 × 43,870.46
4. Step 4: Simplify right side
   86,081.39x = 5,654,138,070.59
5. Step 5: Solve for x
   x = 5,654,138,070.59/86,081.39
6. Step 6: Final answer
   x = 65,683.63