Finding the Fourth Proportional to 85,146.68, 117,457.82 and 64,968.56

Step by Step Solution

1. Step 1: Write the proportion equation
   85,146.68 : 117,457.82 = 64,968.56 : x
2. Step 2: Convert to fraction form
   85,146.68/117,457.82 = 64,968.56/x
3. Step 3: Cross multiply
   85,146.68x = 117,457.82 × 64,968.56
4. Step 4: Simplify right side
   85,146.68x = 7,631,065,426.14
5. Step 5: Solve for x
   x = 7,631,065,426.14/85,146.68
6. Step 6: Final answer
   x = 89,622.58