Finding the Fourth Proportional to 81,586.72, 122,469.57 and 64,827.46

Step by Step Solution

1. Step 1: Write the proportion equation
   81,586.72 : 122,469.57 = 64,827.46 : x
2. Step 2: Convert to fraction form
   81,586.72/122,469.57 = 64,827.46/x
3. Step 3: Cross multiply
   81,586.72x = 122,469.57 × 64,827.46
4. Step 4: Simplify right side
   81,586.72x = 7,939,391,546.58
5. Step 5: Solve for x
   x = 7,939,391,546.58/81,586.72
6. Step 6: Final answer
   x = 97,312.31