Finding the Fourth Proportional to 215,066.49, 322,578.87 and 65,308.07

Step by Step Solution

1. Step 1: Write the proportion equation
   215,066.49 : 322,578.87 = 65,308.07 : x
2. Step 2: Convert to fraction form
   215,066.49/322,578.87 = 65,308.07/x
3. Step 3: Cross multiply
   215,066.49x = 322,578.87 × 65,308.07
4. Step 4: Simplify right side
   215,066.49x = 21,067,003,422.48
5. Step 5: Solve for x
   x = 21,067,003,422.48/215,066.49
6. Step 6: Final answer
   x = 97,955.77