Finding the Fourth Proportional to 65,688.96, 89,994.20 and 63,228.94

Step by Step Solution

1. Step 1: Write the proportion equation
   65,688.96 : 89,994.20 = 63,228.94 : x
2. Step 2: Convert to fraction form
   65,688.96/89,994.20 = 63,228.94/x
3. Step 3: Cross multiply
   65,688.96x = 89,994.20 × 63,228.94
4. Step 4: Simplify right side
   65,688.96x = 5,690,237,872.15
5. Step 5: Solve for x
   x = 5,690,237,872.15/65,688.96
6. Step 6: Final answer
   x = 86,623.97