Finding the Fourth Proportional to 79,451.82, 109,612.17 and 51,173.91

Step by Step Solution

1. Step 1: Write the proportion equation
   79,451.82 : 109,612.17 = 51,173.91 : x
2. Step 2: Convert to fraction form
   79,451.82/109,612.17 = 51,173.91/x
3. Step 3: Cross multiply
   79,451.82x = 109,612.17 × 51,173.91
4. Step 4: Simplify right side
   79,451.82x = 5,609,283,322.48
5. Step 5: Solve for x
   x = 5,609,283,322.48/79,451.82
6. Step 6: Final answer
   x = 70,599.81