Finding the Fourth Proportional to 58,467.84, 80,144.40 and 57,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   58,467.84 : 80,144.40 = 57,680.16 : x
2. Step 2: Convert to fraction form
   58,467.84/80,144.40 = 57,680.16/x
3. Step 3: Cross multiply
   58,467.84x = 80,144.40 × 57,680.16
4. Step 4: Simplify right side
   58,467.84x = 4,622,741,815.10
5. Step 5: Solve for x
   x = 4,622,741,815.10/58,467.84
6. Step 6: Final answer
   x = 79,064.69