Finding the Fourth Proportional to 81,362.84, 112,185.06 and 65,217.20

Step by Step Solution

1. Step 1: Write the proportion equation
   81,362.84 : 112,185.06 = 65,217.20 : x
2. Step 2: Convert to fraction form
   81,362.84/112,185.06 = 65,217.20/x
3. Step 3: Cross multiply
   81,362.84x = 112,185.06 × 65,217.20
4. Step 4: Simplify right side
   81,362.84x = 7,316,395,495.03
5. Step 5: Solve for x
   x = 7,316,395,495.03/81,362.84
6. Step 6: Final answer
   x = 89,923.06