Finding the Fourth Proportional to 78,457.72, 117,674.17 and 34,072.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.72 : 117,674.17 = 34,072.56 : x
2. Step 2: Convert to fraction form
   78,457.72/117,674.17 = 34,072.56/x
3. Step 3: Cross multiply
   78,457.72x = 117,674.17 × 34,072.56
4. Step 4: Simplify right side
   78,457.72x = 4,009,460,217.78
5. Step 5: Solve for x
   x = 4,009,460,217.78/78,457.72
6. Step 6: Final answer
   x = 51,103.45