Finding the Fourth Proportional to 215,420.34, 323,178.48 and 65,672.27

Step by Step Solution

1. Step 1: Write the proportion equation
   215,420.34 : 323,178.48 = 65,672.27 : x
2. Step 2: Convert to fraction form
   215,420.34/323,178.48 = 65,672.27/x
3. Step 3: Cross multiply
   215,420.34x = 323,178.48 × 65,672.27
4. Step 4: Simplify right side
   215,420.34x = 21,223,862,780.86
5. Step 5: Solve for x
   x = 21,223,862,780.86/215,420.34
6. Step 6: Final answer
   x = 98,523.02