Finding the Fourth Proportional to 79,167.79, 109,251.72 and 42,869.64

Step by Step Solution

1. Step 1: Write the proportion equation
   79,167.79 : 109,251.72 = 42,869.64 : x
2. Step 2: Convert to fraction form
   79,167.79/109,251.72 = 42,869.64/x
3. Step 3: Cross multiply
   79,167.79x = 109,251.72 × 42,869.64
4. Step 4: Simplify right side
   79,167.79x = 4,683,581,905.78
5. Step 5: Solve for x
   x = 4,683,581,905.78/79,167.79
6. Step 6: Final answer
   x = 59,160.20