Finding the Fourth Proportional to 79,172.88, 109,258.92 and 42,874.80

Step by Step Solution

1. Step 1: Write the proportion equation
   79,172.88 : 109,258.92 = 42,874.80 : x
2. Step 2: Convert to fraction form
   79,172.88/109,258.92 = 42,874.80/x
3. Step 3: Cross multiply
   79,172.88x = 109,258.92 × 42,874.80
4. Step 4: Simplify right side
   79,172.88x = 4,684,454,343.22
5. Step 5: Solve for x
   x = 4,684,454,343.22/79,172.88
6. Step 6: Final answer
   x = 59,167.41