Finding the Fourth Proportional to 122,581, 169,049.46 and 79,515.64

Step by Step Solution

1. Step 1: Write the proportion equation
   122,581 : 169,049.46 = 79,515.64 : x
2. Step 2: Convert to fraction form
   122,581/169,049.46 = 79,515.64/x
3. Step 3: Cross multiply
   122,581x = 169,049.46 × 79,515.64
4. Step 4: Simplify right side
   122,581x = 13,442,076,003.55
5. Step 5: Solve for x
   x = 13,442,076,003.55/122,581
6. Step 6: Final answer
   x = 109,658.72