Finding the Fourth Proportional to 80,499.84, 120,467.25 and 64,665.96

Step by Step Solution

1. Step 1: Write the proportion equation
   80,499.84 : 120,467.25 = 64,665.96 : x
2. Step 2: Convert to fraction form
   80,499.84/120,467.25 = 64,665.96/x
3. Step 3: Cross multiply
   80,499.84x = 120,467.25 × 64,665.96
4. Step 4: Simplify right side
   80,499.84x = 7,790,130,369.81
5. Step 5: Solve for x
   x = 7,790,130,369.81/80,499.84
6. Step 6: Final answer
   x = 96,772.00