Finding the Fourth Proportional to 79,011.91, 109,066.08 and 51,789.75

Step by Step Solution

1. Step 1: Write the proportion equation
   79,011.91 : 109,066.08 = 51,789.75 : x
2. Step 2: Convert to fraction form
   79,011.91/109,066.08 = 51,789.75/x
3. Step 3: Cross multiply
   79,011.91x = 109,066.08 × 51,789.75
4. Step 4: Simplify right side
   79,011.91x = 5,648,504,801.89
5. Step 5: Solve for x
   x = 5,648,504,801.89/79,011.91
6. Step 6: Final answer
   x = 71,489.28