Finding the Fourth Proportional to 79,427.31, 109,634.30 and 51,133

Step by Step Solution

1. Step 1: Write the proportion equation
   79,427.31 : 109,634.30 = 51,133 : x
2. Step 2: Convert to fraction form
   79,427.31/109,634.30 = 51,133/x
3. Step 3: Cross multiply
   79,427.31x = 109,634.30 × 51,133
4. Step 4: Simplify right side
   79,427.31x = 5,605,930,661.90
5. Step 5: Solve for x
   x = 5,605,930,661.90/79,427.31
6. Step 6: Final answer
   x = 70,579.38