Finding the Fourth Proportional to 79,021.50, 118,388.72 and 45,671.13

Step by Step Solution

1. Step 1: Write the proportion equation
   79,021.50 : 118,388.72 = 45,671.13 : x
2. Step 2: Convert to fraction form
   79,021.50/118,388.72 = 45,671.13/x
3. Step 3: Cross multiply
   79,021.50x = 118,388.72 × 45,671.13
4. Step 4: Simplify right side
   79,021.50x = 5,406,946,393.30
5. Step 5: Solve for x
   x = 5,406,946,393.30/79,021.50
6. Step 6: Final answer
   x = 68,423.74