Finding the Fourth Proportional to 79,172.13, 109,257.89 and 42,874.05

Step by Step Solution

1. Step 1: Write the proportion equation
   79,172.13 : 109,257.89 = 42,874.05 : x
2. Step 2: Convert to fraction form
   79,172.13/109,257.89 = 42,874.05/x
3. Step 3: Cross multiply
   79,172.13x = 109,257.89 × 42,874.05
4. Step 4: Simplify right side
   79,172.13x = 4,684,328,024.38
5. Step 5: Solve for x
   x = 4,684,328,024.38/79,172.13
6. Step 6: Final answer
   x = 59,166.38