Finding the Fourth Proportional to 215,642.71, 323,513.27 and 65,904.29

Step by Step Solution

1. Step 1: Write the proportion equation
   215,642.71 : 323,513.27 = 65,904.29 : x
2. Step 2: Convert to fraction form
   215,642.71/323,513.27 = 65,904.29/x
3. Step 3: Cross multiply
   215,642.71x = 323,513.27 × 65,904.29
4. Step 4: Simplify right side
   215,642.71x = 21,320,912,364.93
5. Step 5: Solve for x
   x = 21,320,912,364.93/215,642.71
6. Step 6: Final answer
   x = 98,871.47