Finding the Fourth Proportional to 79,019.28, 109,013.76 and 51,787.92

Step by Step Solution

1. Step 1: Write the proportion equation
   79,019.28 : 109,013.76 = 51,787.92 : x
2. Step 2: Convert to fraction form
   79,019.28/109,013.76 = 51,787.92/x
3. Step 3: Cross multiply
   79,019.28x = 109,013.76 × 51,787.92
4. Step 4: Simplify right side
   79,019.28x = 5,645,595,881.78
5. Step 5: Solve for x
   x = 5,645,595,881.78/79,019.28
6. Step 6: Final answer
   x = 71,445.80