Finding the Fourth Proportional to 79,109.40, 109,170.14 and 42,810.05

Step by Step Solution

1. Step 1: Write the proportion equation
   79,109.40 : 109,170.14 = 42,810.05 : x
2. Step 2: Convert to fraction form
   79,109.40/109,170.14 = 42,810.05/x
3. Step 3: Cross multiply
   79,109.40x = 109,170.14 × 42,810.05
4. Step 4: Simplify right side
   79,109.40x = 4,673,579,151.91
5. Step 5: Solve for x
   x = 4,673,579,151.91/79,109.40
6. Step 6: Final answer
   x = 59,077.42